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“The Armor of God”· Ephesians 6:10–18
Translation
King James Version
And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
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KJV (with Strong's)
And G2532 take G1209 the helmet G4030 of salvation G4992, and G2532 the sword G3162 of the Spirit G4151, which is G3603 the word G4487 of God G2316:
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Complete Jewish Bible
And take the helmet of deliverance; along with the sword given by the Spirit, that is, the Word of God;
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Berean Standard Bible
And take the helmet of salvation and the sword of the Spirit, which is the word of God.
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American Standard Version
And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
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World English Bible Messianic
And take the helmet of salvation, and the sword of the Spirit, which is the word of God;
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Geneva Bible (1599)
And take the helmet of saluation, and the sword of the Spirit, which is the worde of God.
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Young's Literal Translation
and the helmet of the salvation receive, and the sword of the Spirit, which is the saying of God,
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In the KJVVerse 29,355 of 31,102 · 94.4%

Study This Verse

Summary

Ephesians 6:17 presents two vital components of the spiritual armor God provides believers for spiritual warfare: the helmet of salvation and the sword of the Spirit, which is identified as the word of God. This verse underscores the critical need for believers to actively appropriate the assurance of their salvation to protect their minds from the enemy's assaults, while simultaneously wielding the specific, Spirit-empowered truth of God's revealed word as their primary offensive weapon against spiritual darkness.

Context

Literary Context

This verse is an integral part of Paul's extended metaphor of the "armor of God" found in Ephesians 6:10-20. Following a general exhortation to "be strong in the Lord" and "put on the whole armour of God" in Ephesians 6:10-11, Paul systematically describes each piece of the armor, beginning with defensive elements like the belt of truth, the breastplate of righteousness, and shoes of peace in Ephesians 6:14-15. The shield of faith is then introduced in Ephesians 6:16, which serves to extinguish the "fiery darts of the wicked." Ephesians 6:17 then introduces the final two pieces, one defensive and one offensive, completing the picture of the believer's readiness for battle. The passage culminates with an emphasis on prayer in Ephesians 6:18-20, highlighting its essential role in effective spiritual engagement.

Historical & Cultural Context

Paul's imagery of the Roman soldier's armor would have been immediately recognizable and highly relevant to his original audience. Roman soldiers were a common sight throughout the empire, and their military equipment was a symbol of power and order. Paul, possibly writing from imprisonment (see Ephesians 3:1), may have observed Roman guards firsthand, inspiring this vivid metaphor. The city of Ephesus itself was a bustling metropolis, a center of diverse religious practices, pagan worship, and occult arts (Acts 19:19). The early Ephesian Christians would have faced significant spiritual opposition and cultural pressures, making Paul's instruction on spiritual warfare not merely theoretical but a practical guide for daily living in a hostile spiritual environment. The "spiritual wickedness in high places" mentioned in Ephesians 6:12 would have resonated deeply with their experiences.

Key Themes

This verse powerfully contributes to several overarching themes in Ephesians. Firstly, it reinforces the theme of spiritual warfare, emphasizing that believers are engaged in a real, unseen battle against supernatural forces, not merely human adversaries. Secondly, it highlights divine provision, assuring believers that God has equipped them fully for this conflict, leaving them without excuse. The armor is "of God," indicating its divine origin and efficacy. Thirdly, the verse underscores the practicality of faith and the active role of the believer; the armor is not passively received but must be "taken" and "put on." Finally, it elevates the supremacy and power of God's Word and the essential work of the Holy Spirit in the life of the believer. The Word of God, wielded by the Spirit, is presented as the decisive offensive weapon, echoing its creative power in Genesis 1 and its transformative power in John 1:1-14.

Exposition and Analysis

Key Word Analysis

take déchomai' G1209

This verb, G1209, signifies receiving in a welcoming or active manner, often implying acceptance or appropriation. Unlike merely "putting on" some pieces of armor, "taking" the helmet and sword suggests a conscious, intentional act of appropriation. It implies not just possession, but active engagement and readiness to use what has been provided. For the helmet of salvation, it means actively embracing and resting in the assurance of one's salvation. For the sword, it means actively grasping and wielding the word of God.

helmet perikephalaía' G4030

Literally meaning "encirclement of the head," refers to the protective headgear of a soldier. In the spiritual metaphor, the helmet guards the most vital part of the body—the head, which symbolizes the mind, thoughts, and understanding. This protection is specifically identified as "salvation," indicating that the assurance and reality of one's redemption in Christ are the primary defense against the enemy's attacks on one's identity, hope, and security.

word rhēma' G4487

Refers to an utterance, a spoken word, a specific declaration, or a matter. While often contrasted with logos (G3056), which can denote the broader, indwelling Word or divine reason, rhema emphasizes the specific, active, and immediate word of God spoken or applied in a particular situation. It suggests the dynamic, living word that the Spirit brings to mind for specific application, much like Jesus used specific Scripture verses to counter Satan's temptations in the wilderness (Matthew 4:4).

Verse Breakdown

"And take the helmet of salvation"

This clause emphasizes the defensive aspect of our spiritual equipment. The "helmet" symbolizes protection for the mind, thoughts, and identity. The "salvation" refers not just to a past event of conversion, but to the ongoing reality and assurance of our deliverance and security in Christ. It is the firm conviction and joyful confidence in our redeemed status that guards against the enemy's lies, doubts, and despair that target our minds and seek to undermine our faith. Actively "taking" it means consciously resting in and applying this truth.

"and the sword of the Spirit"

This introduces the sole offensive weapon in Paul's description of the armor. The "sword" (máchaira) refers to a short sword or dagger, used for close-quarters combat. It is not a weapon for distant attacks but for direct, decisive engagement. Crucially, it is "of the Spirit," meaning it is empowered, given, and wielded by the Holy Spirit. This highlights that our spiritual battles are not fought in our own strength or wisdom, but through the divine enablement of God's Spirit.

"which is the word of God"

This phrase directly identifies the sword of the Spirit. The "word" here is rhema, signifying the specific, spoken, and active word of God, rather than the general concept of divine reason (logos). It is the truth of God, applied by the Holy Spirit, that becomes a sharp, piercing weapon against spiritual deception and opposition. This emphasizes the dynamic nature of Scripture—not merely a static text, but a living, powerful declaration that the Spirit empowers believers to speak and apply in moments of spiritual conflict.

Literary Devices

Paul's description of the spiritual armor in Ephesians 6 is built upon an extended Metaphor. He uses the tangible, familiar equipment of a Roman soldier to represent abstract spiritual realities. Each piece of armor—the helmet, the sword—stands for a corresponding spiritual truth or resource. This Metaphor allows for a vivid and memorable understanding of complex theological concepts like salvation and the Word of God as active defenses and offenses. Furthermore, there is clear Symbolism at play: the helmet symbolizes the protection of the mind through the assurance of salvation, and the sword symbolizes the active, piercing power of God's Word. The phrase "sword of the Spirit" also contains an element of Genitive of Source or Agency, indicating that the Spirit is the one who provides and empowers the use of this divine weapon.

Theological and Thematic Connections

Ephesians 6:17 deeply connects to the broader biblical narrative of God's provision for His people in the face of evil. It underscores that while spiritual warfare is real and intense, believers are not left defenseless. The helmet of salvation speaks to the finished work of Christ, which secures our eternal destiny and provides an unshakeable foundation for our identity and hope, guarding our minds against doubt and despair. The sword of the Spirit, the word of God, highlights the living and active nature of Scripture, not as mere human words, but as divine revelation empowered by the Holy Spirit to cut through deception and expose darkness. This verse reminds us that our spiritual strength comes from God's resources, not our own, and that both defensive assurance and offensive truth are essential for standing firm against the schemes of the adversary.

Reflection and Application

To effectively "take the helmet of salvation" and "the sword of the Spirit," believers must engage in both a defensive and offensive posture in their daily lives. Defensively, we must constantly reaffirm and rest in the truth of our salvation, allowing its assurance to guard our minds against the lies, accusations, and doubts that the enemy hurls our way. This means meditating on who we are in Christ—forgiven, redeemed, adopted, and eternally secure—and allowing these truths to shape our thoughts and emotions. Offensively, we are called to actively wield the word of God. This requires more than passive reading; it demands diligent study, memorization, and prayerful application of Scripture. As the Holy Spirit brings specific truths to mind, we are to speak them out, apply them to situations, and use them to counter spiritual opposition, just as Jesus did in the wilderness. Our effectiveness in spiritual battle is directly tied to our reliance on the Spirit and our familiarity with the living, active Word of God.

Questions for Reflection

  1. How does the assurance of my salvation actively protect my mind from the enemy's lies and doubts in my daily life?
  2. In what ways am I actively "taking" or appropriating the word of God as my offensive weapon, rather than merely possessing it?
  3. How can I become more sensitive to the Holy Spirit's leading in bringing specific Scriptures to mind for spiritual combat or guidance?
  4. What specific lies or attacks on my mind can I counter by consciously putting on the "helmet of salvation" today?

FAQ

What is the distinction between rhema and logos in the New Testament, and why is rhema used here?

In the New Testament, both rhema (G4487) and logos (G3056) are translated as "word," but they carry distinct nuances. Logos often refers to the broader, comprehensive, or eternal Word of God, such as the entire body of divine truth, God's eternal plan, or even Jesus Christ Himself as the incarnate Word (e.g., John 1:1). Rhema, on the other hand, typically denotes a specific, spoken word, an utterance, or a particular declaration of God that is active and immediate. In Ephesians 6:17, rhema is used because the context is active spiritual combat. It emphasizes the specific, timely, and Spirit-empowered utterance of God's truth that is wielded like a sword in a particular moment of need, much like Jesus quoted specific Scriptures to defeat Satan's temptations in Matthew 4:1-11. It's the "word for the moment," applied powerfully by the Spirit.

Why is the sword of the Spirit the only offensive weapon in the armor of God?

Paul's description of the armor of God largely emphasizes defensive pieces (belt, breastplate, shoes, shield, helmet) designed to enable the believer to "stand firm" (Ephesians 6:11, 13). The "sword of the Spirit, which is the word of God," stands out as the sole offensive weapon. This highlights the unique and decisive power of God's revealed truth in spiritual warfare. While faith (the shield) can extinguish attacks, and salvation (the helmet) protects the mind, the Word of God is the means by which believers actively engage, expose, and overcome the enemy's lies and strongholds. It suggests that our primary offensive strategy is not human strength or cleverness, but the authoritative declaration and application of divine truth, empowered by the Holy Spirit. This aligns with Hebrews 4:12, which describes the Word of God as "sharper than any twoedged sword."

Christ-Centered Fulfillment

Ephesians 6:17 finds its ultimate fulfillment and perfect embodiment in Jesus Christ. He is not merely the one who provides the armor, but He Himself is the living example and the very essence of each piece. As the "helmet of salvation," Jesus is the author and perfecter of our faith, securing our eternal salvation through His sacrificial death and resurrection (Hebrews 12:2). Our assurance and hope are found solely in Him, guarding our minds from despair and deception. Furthermore, Jesus perfectly wielded "the sword of the Spirit, which is the word of God." Throughout His earthly ministry, especially during His temptation in the wilderness, He countered every lie and assault of Satan with specific, authoritative declarations from Scripture, demonstrating the power of the rhema of God (Matthew 4:4). He is the ultimate "Word of God" made flesh (John 1:1), embodying the truth He proclaimed. In Christ, we see the perfect union of divine provision and perfect obedience, enabling us to stand firm and overcome through His victory. Our ability to wear the helmet of salvation and wield the sword of the Spirit is entirely dependent on our union with Him, for He is our salvation and the living Word through whom the Spirit empowers us.

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Public-domain commentary

Matthew Henry

From his Commentary on the Whole Bible. Henry comments on passages, not single verses — this entry covers Ephesians 6:10–18. His four-level outline is real structure in the source text, so it is rendered as structure.

1662–1714 · 9 verses
Passage under commentEphesians 6:10–18
I. II. Main points1. 2. Sub-points(1.) (2.) Details[1.] [2.] Fine details

Here is a general exhortation to constancy in our Christian course, and to encourage in our Christian warfare. Is not our life a warfare? It is so; for we struggle with the common calamities of human life. Is not our religion much more a warfare? It is so; for we struggle with the opposition of the powers of darkness, and with many enemies who would keep us from God and heaven. We have enemies to fight against, a captain to fight for, a banner to fight under, and certain rules of war by which we are to govern ourselves. "Finally, my brethren (Eph 6:10), it yet remains that you apply yourselves to your work and duty as Christian soldiers." Now it is requisite that a soldier be both stout-hearted and well armed. If Christians be soldiers of Jesus Christ,

I.They must see that they be stout-hearted.

This is prescribed here: Be strong in the Lord, etc. Those who have so many battles to fight, and who, in their way to heaven, must dispute every pass, with dint of sword, have need of a great deal of courage. Be strong therefore, strong for service, strong for suffering, strong for fighting. Let a soldier be ever so well armed without, if he have not within a good heart, his armour will stand him in little stead. Note, spiritual strength and courage are very necessary for our spiritual warfare. Be strong in the Lord, either in his cause and for his sake or rather in his strength. We have no sufficient strength of our own. Our natural courage is as perfect cowardice, and our natural strength as perfect weakness; but all our sufficiency is of God. In his strength we must go forth and go on. By the actings of faith, we must fetch in grace and help from heaven to enable us to do that which of ourselves we cannot do, in our Christian work and warfare. We should stir up ourselves to resist temptations in a reliance upon God's all-sufficiency and the omnipotence of his might.

II.They must be well armed:

"Put on the whole armour of God (Eph 6:11), make use of all the proper defensitives and weapons for repelling the temptations and stratagems of Satan - get and exercise all the Christian graces, the whole armour, that no part be naked and exposed to the enemy." Observe, Those who would approve themselves to have true grace must aim at all grace, the whole armour. It is called the armour of God, because he both prepares and bestows it. We have no armour of our own that will be armour of proof in a trying time. Nothing will stand us in stead but the armour of God. This armour is prepared for us, but we must put it on; that is, we must pray for grace, we must use the grace given us, and draw it out into act and exercise as there is occasion. The reason assigned why the Christian should be completely armed is that he may be able to stand against the wiles of the devil - that he may be able to hold out, and to overcome, notwithstanding all the devil's assaults, both of force and fraud, all the deceits he puts upon us, all the snares he lays for us, and all his machinations against us. This the apostle enlarges upon here, and shows,

1.What our danger is, and what need we have to put on this whole armour, considering what sort of enemies we have to deal with - the devil and all the powers of darkness: For we wrestle not against flesh and blood, etc., Eph 6:12. The combat for which we are to be prepared is not against ordinary human enemies, not barely against men compounded of flesh and blood, nor against our own corrupt natures singly considered, but against the several ranks of devils, who have a government which they exercise in this world.

(1.)We have to do with a subtle enemy, an enemy who uses wiles and stratagems, as Eph 6:11. He has a thousand ways of beguiling unstable souls: hence he is called a serpent for subtlety, an old serpent, experienced in the art and trade of tempting.

(2.)He is a powerful enemy: Principalities, and powers, and rulers. They are numerous, they are vigorous; and rule in those heathen nations which are yet in darkness. The dark parts of the world are the seat of Satan's empire. Yea, they are usurping princes over all men who are yet in a state of sin and ignorance. Satan's is a kingdom of darkness; whereas Christ's is a kingdom of light.

(3.)They are spiritual enemies: Spiritual wickedness in high places, or wicked spirits, as some translate it. The devil is a spirit, a wicked spirit; and our danger is the greater from our enemies because they are unseen, and assault us ere we are aware of them. The devils are wicked spirits, and they chiefly annoy the saints with, and provoke them to, spiritual wickednesses, pride, envy, malice, etc. These enemies are said to be in high places, or in heavenly places, so the word is, taking heaven (as one says) for the whole expansum, or spreading out of the air between the earth and the stars, the air being the place from which the devils assault us. Or the meaning may be, "We wrestle about heavenly places or heavenly things;" so some of the ancients interpret it. Our enemies strive to prevent our ascent to heaven, to deprive us of heavenly blessings and to obstruct our communion with heaven. They assault us in the things that belong to our souls, and labour to deface the heavenly image in our hearts; and therefore we have need to be upon our guard against them. We have need of faith in our Christian warfare, because we have spiritual enemies to grapple with, as well as of faith in our Christian work, because we have spiritual strength to fetch in. Thus you see your danger.

2.What our duty is: to take and put on the whole armour of God, and then to stand our ground, and withstand our enemies.

(1.)We must withstand, Eph 6:13. We must not yield to the devil's allurements and assaults, but oppose them. Satan is said to stand up against us, Ch1 21:1. If he stand up against us, we must stand against him; set up, and keep up, an interest in opposition to the devil. Satan is the wicked one, and his kingdom is the kingdom of sin: to stand against Satan is to strive against sin. That you may be able to withstand in the evil day, in the day of temptation, or of any sore affliction.

(2.)We must stand our ground: And, having done all, to stand. We must resolve, by God's grace, not to yield to Satan. Resist him, and he will flee. If we distrust our cause, or our leader, or our armour, we give him advantage. Our present business is to withstand the assaults of the devil, and to stand it out; and then, having done all that is incumbent on the good soldiers of Jesus Christ, our warfare will be accomplished, and we shall be finally victorious.

(3.)We must stand armed; and this is here most enlarged upon. Here is a Christian in complete armour: and the armour is divine: Armour of God, armour of light, Rom 13:12. Armour of righteousness, Co2 6:7. The apostle specifies the particulars of this armour, both offensive and defensive. The military girdle or belt, the breast-plate, the greaves (or soldier's shoes), the shield, the helmet, and the sword. It is observable that, among them all, there is none for the back; if we turn our back upon the enemy, we lie exposed.

[1.]Truth or sincerity is our girdle, Eph 6:14. It was prophesied of Christ (Isa 11:5) that righteousness should be the girdle of his loins and faithfulness the girdle of his reins. That which Christ was girded with all Christians must be girded with. God desires truth, that is, sincerity, in the inward parts. This is the strength of our loins; and it girds on all other pieces of our armour, and therefore is first mentioned. I know no religion without sincerity. Some understand it of the doctrine of the truths of the gospel: they should cleave to us as the girdle does to the loins, Jer 13:11. This will restrain from libertinism and licentiousness, as a girdle restrains and keeps in the body. This is the Christian soldier's belt: ungirded with this, he is unblessed.

[2.]Righteousness must be our breast-plate. The breast-plate secures the vitals, shelters the heart. The righteousness of Christ imputed to us is our breast-plate against the arrows of divine wrath. The righteousness of Christ implanted in us is our breast-plate to fortify the heart against the attacks which Satan makes against us. The apostle explains this in Th1 5:8, Putting on the breast-plate of faith and love. Faith and love include all Christian graces; for by faith we are united to Christ and by love to our brethren. These will infer a diligent observance of our duty to God, and a righteous deportment towards men, in all the offices of justice, truth, and charity.

[3.]Resolution must be as the greaves to our legs: And their feet shod with the preparation of the gospel of peace, Eph 6:15. Shoes, or greaves of brass, or the like, were formerly part of the military armour (Sa1 17:6): the use of them was to defend the feet against the gall-traps, and sharp sticks, which were wont to be laid privily in the way, to obstruct the marching of the enemy, those who fell upon them being unfit to march. The preparation of the gospel of peace signifies a prepared and resolved frame of heart, to adhere to the gospel and abide by it, which will enable us to walk with a steady pace in the way of religion, notwithstanding the difficulties and dangers that may be in it. It is styled the gospel of peace because it brings all sorts of peace, peace with God, with ourselves, and with one another. It may also be meant of that which prepares for the entertainment of the gospel, namely, repentance. With this our feet must be shod: for by living a life of repentance we are armed against temptations to sin, and the designs of our great enemy. Dr. Whitby thinks this may be the sense of the words: "That you may be ready for the combat, be shod with the gospel of peace, endeavour after that peaceable and quiet mind which the gospel calls for. Be not easily provoked, nor prone to quarrel: but show all gentleness and all long-suffering to all men, and this will certainly preserve you from many great temptations and persecutions, as did those shoes of brass the soldiers from those galltraps," etc.

[4.]Faith must be our shield: Above all, or chiefly, taking the shield of faith, Eph 6:16. This is more necessary than any of them. Faith is all in all to us in an hour of temptation. The breast-plate secures the vitals; but with the shield we turn every way. This is the victory over the world, even our faith. We are to be fully persuaded of the truth of all God's promises and threatenings, such a faith being of great use against temptations. Consider faith as it is the evidence of things not seen and the substance of things hoped for, and it will appear to be of admirable use for this purpose. Faith, as receiving Christ and the benefits of redemption, so deriving grace from him, is like a shield, a sort of universal defence. Our enemy the devil is here called the wicked one. He is wicked himself, and he endeavours to make us wicked. His temptations are called darts, because of their swift and undiscerned flight, and the deep wounds that they give to the soul; fiery darts, by way of allusion to the poisonous darts which were wont to inflame the parts which were wounded with them, and therefore were so called, as the serpents with poisonous stings are called fiery serpents. Violent temptations, by which the soul is set on fire of hell, are the darts which Satan shoots at us. Faith is the shield with which we must quench these fiery darts, wherein we should receive them, and so render them ineffectual, that they may not hit us, or at least that they may not hurt us. Observe, Faith, acted upon the word of God and applying that, acted upon the grace of Christ and improving that, quenches the darts of temptation.

[5.]Salvation must be our helmet (Eph 6:17); that is, hope, which has salvation for its object; so Th1 5:8. The helmet secures the head. A good hope of salvation, well founded and well built, will both purify the soul and keep it from being defiled by Satan, and it will comfort the soul and keep it from being troubled and tormented by Satan. He would tempt us to despair; but good hope keeps us trusting in God, and rejoicing in him.

[6.]The word of God is the sword of the Spirit. The sword is a very necessary and useful part of a soldier's furniture. The word of God is very necessary, and of great use to the Christian, in order to his maintaining the spiritual warfare and succeeding in it. It is called the sword of the Spirit, because it is of the Spirit's inditing and he renders it efficacious and powerful, and sharper than a two-edged sword. Like Goliath's sword, none like that; with this we assault the assailants. Scripture-arguments are the most powerful arguments to repel temptation with. Christ himself resisted Satan's temptations with, It is written, Mat 4:4, Mat 4:6, Mat 4:7, Mat 4:10. This, being hid in the heart, will preserve from sin (Psa 119:11), and will mortify and kill those lusts and corruptions that are latent there.

[7.]Prayer must buckle on all the other parts of our Christian armour, Eph 6:18. We must join prayer with all these graces, for our defence against these spiritual enemies, imploring help and assistance of God, as the case requires: and we must pray always. Not as though we were to do nothing else but pray, for there are other duties of religion and of our respective stations in the world that are to be done in their place and season; but we should keep up constant times of prayer, and be constant to them. We must pray upon all occasions, and as often as our own and others' necessities call us to it. We must always keep up a disposition to prayer, and should intermix ejaculatory prayers with other duties, and with common business. Though set and solemn prayer may sometimes be unseasonable (as when other duties are to be done), yet pious ejaculations can never be so. We must pray with all prayer and supplication, with all kinds of prayer: public, private, and secret, social and solitary, solemn and sudden; with all the parts of prayer: confession of sin, petition for mercy, and thanksgivings for favours received. We must pray in the Spirit; our spirits must be employed in the duty and we must do it by the grace of God's good Spirit. We must watch thereunto, endeavouring to keep our hearts in a praying frame, and taking all occasions, and improving all opportunities, for the duty: we must watch to all the motions of our own hearts towards the duty. When God says, Seek my face, our hearts must comply, Psa 27:8. This we must do with all perseverance. We must abide by the duty of prayer, whatever change there may be in our outward circumstances; and we must continue in it as long as we live in the world. We must persevere in a particular prayer; not cutting it short, when our hearts are disposed to enlarge, and there is time for it, and our occasions call for it. We must likewise persevere in particular requests, notwithstanding some present discouragements and repulses. And we must pray with supplication, not for ourselves only, but for all saints; for we are members one of another. Observe, None are so much saints, and in so good a condition in this world, but they need our prayers, and they ought to have them. The apostle passes hence to the conclusion of the epistle.

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Historical interpretation

Three Centuries of Reception

8 surviving comments on this verse. Each one is dated, so this reads as a timeline rather than a list.

8 quotes · AD 220–500
Ante-NicenePost-Nicene
200300400500

Select a marker to jump to its quote. Markers stagger vertically where authors wrote within a few decades of each other.

AD 220TertullianAnte-NiceneSourceAn Answer to the Jews
Who will ply the sword without practising the contraries to lenity and justice; that is, guile, and asperity, and injustice, proper (of course) to the business of battles? See we, then, whether that which has another action be not another sword,-that is, the Divine word of God, doubly sharpened with the two Testaments of the ancient law and the new law; sharpened by the equity of its own wisdom; rendering to each one according to his own action.
AD 370Gaius Marius VictorinusPost-NiceneSourceEPISTLE TO THE EPHESIANS 2.6.17
It is Christ indeed who is the author of salvation. He is our head. He descended to us and redeemed us by his own mystery. It is he indeed who guards the heads of the faithful. Therefore he is the “helmet of salvation.” He is the Word by which the adverse powers are overcome and taken captive.… Christ, who is the Word of God, was sent to overcome all corruption and wickedness and even death itself. It is in this sense that Paul refers to “the sword of the Spirit, the Word of God.”
"And take the helmet," he continues, "of salvation," that is, of your salvation. For he is casing them in armor.

And therefore he adds further, "and take the helmet of salvation"; that is to say, finally by this shall ye be able to be in security. To receive the helmet of salvation is to escape the peril. For as the helmet covers the head perfectly in every part, and suffers it not to sustain any injury, but preserves it, so also does faith supply alike the place of a shield, and of a helmet to preserve us. For if we quench his darts, quickly shall we receive also those saving thoughts that suffer not our governing principle to sustain any harm; for if these, the thoughts that are adverse to our salvation, are quenched, those which are not so, but which contribute to our salvation, and inspire us with good hopes, will be generated within us, and will rest upon our governing principle, as a helmet does upon the head.

"And the sword of the Spirit, which is the word of God." He either means the Spirit, or else, "the spiritual sword": for by this all things are severed, by this all things are cleft asunder, by this we cut off even the serpent's head.

And not only this, but we shall take also "the sword of the Spirit," and thus not only ward off his missiles, but smite the devil himself. For a soul that does not despair of herself, and is proof against those fiery darts, will stand with all intrepidity to face the enemy, and will cleave open his breastplate with this very sword with which Paul also burst through it, and "brought into captivity his devices" (2 Cor. x. 5); he will cut off and behead the serpent.

"Which is the word of God."

By the "word of God" in this place, he means on the one hand the ordinance of God, or the word of command; or on the other that it is in the Name of Christ. For if we keep his commandments, by these we shall kill and slay the dragon himself, "the crooked serpent." (Isa. xxvii. 1.) And as he said, "Ye shall be able to quench the fiery darts of the evil one"; that he might not puff them up, he shows them, that above all things they stand in need of God; for what does he say?
Because of this helmet of salvation all the senses in our head remain intact. It especially protects the eyes. Solomon in Ecclesiastes notes that “the eyes of the wise are in the head.” Paul understood the importance of headship. He knew why the eyes are located in the head. If Christ is the head of a person of faith and “the eyes of the wise are in the head,” it follows that all our senses, mind, thought, speech and counsel (if, that is, we are wise) are in Christ.
AD 435John CassianPost-NiceneSourceCONFERENCES 20.8.11
This is the sword that for our health spills the noxious blood that animates the matter of our sins, cutting out and excising whatever it finds in our soul that is carnal or earthly and, once it has made us dead to vices, causing us to live to God and flourish in spiritual virtues.
By “the sword of the Spirit” he means the activity of the Spirit. This is the Word of God. This means that just as God fashioned all by the Word, so the most Holy Spirit effects all that has to do with our salvation. With this sword the spiritual person rebukes the devil, and the devil flees.
Source: Quotations drawn from early Church Fathers and historical Christian theologians (AD 100–1500). Some quotes address the surrounding passage context rather than this verse alone.
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