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Commentary on Matthew 5 verses 33–37
We have here an exposition of the third commandment, which we are the more concerned right to understand, because it is particularly said, that God will not hold him guiltless, however he may hold himself, who breaks this commandment, by taking the name of the Lord in vain. Now as to this command,
I. It is agreed on all hands that it forbids perjury, forswearing, and the violation of oaths and vows, Mat 5:33. This was said to them of old time, and is the true intent and meaning of the third commandment. Thou shalt not use, or take up, the name of God (as we do by an oath) in vain, or unto vanity, or a lie. He hath not lift up his soul unto vanity, is expounded in the next words, nor sworn deceitfully, Psa 24:4. Perjury is a sin condemned by the light of nature, as a complication of impiety toward God and injustice toward man, and as rendering a man highly obnoxious to the divine wrath, which was always judged to follow so infallibly upon that sin, that the forms of swearing were commonly turned into execrations or imprecations; as that, God do so to me, and more also; and with us, So help me God; wishing I may never have any help from God, if I swear falsely. Thus, by the consent of nations, have men cursed themselves, not doubting but that God would curse them, if they lied against the truth then, when they solemnly called God to witness to it.
It is added, from some other scriptures, but shalt perform unto the Lord thine oaths (Num 30:2); which may be meant, either, 1. Of those promises to which God is a party, vows made to God; these must be punctually paid (Ecc 5:4, Ecc 5:5): or, 2. Of those promises made to our brethren, to which God was a Witness, he being appealed to concerning our sincerity; these must be performed to the Lord, with an eye to him, and for his sake: for to him, by ratifying the promises with an oath, we have made ourselves debtors; and if we break a promise so ratified, we have not lied unto men only, but unto God.
II. It is here added, that the commandment does not only forbid false swearing, but all rash, unnecessary swearing: Swear not at all, Mat 5:34; Compare Jam 5:12. Not that all swearing is sinful; so far from that, if rightly done, it is a part of religious worship, and we in it give unto God the glory due to his name. See Deu 6:13; Deu 10:20; Isa 45:23; Jer 4:2. We find Paul confirming what he said by such solemnities (Co2 1:23), when there was a necessity for it. In swearing, we pawn the truth of something known, to confirm the truth of something doubtful or unknown; we appeal to a greater knowledge, to a higher court, and imprecate the vengeance of a righteous Judge, if we swear deceitfully.
Now the mind of Christ in this matter is,
1.That we must not swear at all, but when we are duly called to it, and justice or charity to our brother, or respect to the commonwealth, make it necessary for the end of strife (Heb 6:16), of which necessity the civil magistrate is ordinarily to be the judge. We may be sworn, but we must now swear; we may be adjured, and so obliged to it, but we must not thrust ourselves upon it for our own worldly advantage.
2.That we must not swear lightly and irreverently, in common discourse: it is a very great sin to make a ludicrous appeal to the glorious Majesty of heaven, which, being a sacred thing, ought always to be very serious: it is a gross profanation of God's holy name, and of one of the holy things which the children of Israel sanctify to the Lord: it is a sin that has no cloak, no excuse for it, and therefore a sign of a graceless heart, in which enmity to God reigns: Thine enemies take thy name in vain.
3.That we must in a special manner avoid promissory oaths, of which Christ more particularly speaks here, for they are oaths that are to be performed. The influence of an affirmative oath immediately ceases, when we have faithfully discovered the truth, and the whole truth; but a promissory oath binds so long, and may be so many ways broken, by the surprise as well as strength of a temptation, that it is not to be used but upon great necessity: the frequent requiring and using of oaths, is a reflection upon Christians, who should be of such acknowledged fidelity, as that their sober words should be as sacred as their solemn oaths.
4.That we must not swear by any other creature. It should seem there were some, who, in civility (as they thought) to the name of God, would not make use of that in swearing, but would swear by heaven or earth, etc. This Christ forbids here (Mat 5:34) and shows that there is nothing we can swear by, but it is some way or other related to God, who is the Fountain of all beings, and therefore that it is as dangerous to swear by them, as it is to swear by God himself: it is the verity of the creature that is laid at stake; now that cannot be an instrument of testimony, but as it has regard to God, who is the summum verum - the chief Truth. As for instance,
(1.)Swear not by the heaven; "As sure as there is a heaven, this is true;" for it is God's throne, where he resides, and in a particular manner manifests his glory, as a Prince upon his throne: this being the inseparable dignity of the upper world, you cannot swear by heaven, but you swear by God himself.
(2.)Nor by the earth, for it is his footstool. He governs the motions of this lower world; as he rules in heaven, so he rules over the earth; and though under his feet, yet it is also under his eye and care, and stands in relation to him as his, Psa 24:1. The earth is the Lord's; so that in swearing by it, you swear by its Owner.
(3.)Neither by Jerusalem, a place for which the Jews had such a veneration, that they could not speak of any thing more sacred to swear by; but beside the common reference Jerusalem has to God, as part of the earth, it is in special relation to him, for it is the city of the great King (Psa 48:2), the city of God (Psa 46:4), he is therefore interested in it, and in every oath taken by it.
(4.)"Neither shalt thou swear by the head; though it be near thee, and an essential part of thee, yet it is more God's than thine; for he made it, and formed all the springs and powers of it; whereas thou thyself canst not, from any natural intrinsic influence, change the colour of one hair, so as to make it white or black; so that thou canst not swear by thy head, but thou swearest by him who is the Life of thy head, and the Lifter up of it." Psa 3:3.
5.That therefore in all our communications we must content ourselves with, Yea, yea, and nay, nay, Mat 5:37. In ordinary discourse, if we affirm a thing, let us only say, Yea, it is so; and, if need be, to evidence our assurance of a thing, we may double it, and say, Yea, yea, indeed it is so: Verily, verily, was our Saviour's yea, yea. So if we deny a thing, let is suffice to say, No; or if it be requisite, to repeat the denial, and say, No, no; and if our fidelity be known, that will suffice to gain us credit; and if it be questioned, to back what we say with swearing and cursing, is but to render it more suspicious. They who can swallow a profane oath, will not strain at a lie. It is a pity that this, which Christ puts in the mouths of all his disciples, should be fastened, as a name of reproach, upon a sect faulty enough other ways, when (as Dr. Hammond says) we are not forbidden any more than yea and nay, but are in a manner directed to the use of that.
The reason is observable; For whatsoever is more than these cometh of evil, though it do not amount to the iniquity of an oath. It comes ek tou Diabolou; so an ancient copy has it: it comes from the Devil, the evil one; it comes from the corruption of men's nature, from passion and vehemence; from a reigning vanity in the mind, and a contempt of sacred things: it comes from that deceitfulness which is in men, All men are liars; therefore men use these protestations, because they are distrustful one of another, and think they cannot be believed without them. Note, Christians should, for the credit of their religion, avoid not only that which is in itself evil, but that which cometh of evil, and has the appearance of it. That may be suspected as a bad thing, which comes from a bad cause. An oath is physic, which supposes a disease.
Otherwise; They who live in the simplicity of the faith have not need to swear, with them ever, what is is, what is not is not; by this their life and their conversation are ever preserved in truth.
"Again, ye have heard that it was said to them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths. But I say unto you, swear not at all."
Why did He go straightway not to theft, but to false witness, passing over that commandment? Because he that steals, doth upon occasion swear also; but he that knows not either swearing or speaking falsehood, much less will he choose to steal. So that by this He hath overthrown the other sin likewise: since falsehood comes of stealing.
But what means, "Thou shalt perform unto the Lord thine oaths?" It is this, "thou shalt be true in swearing." "But I say unto you, swear not at all."
Next, to lead them farther away from swearing by God, He saith, "Neither by Heaven, for it is God's throne, nor by the earth, for it is the footstool of His feet; nor by Jerusalem, for it is the city of the great King:" still speaking out of the prophetical writings, and signifying Himself not to be opposed to the ancients. This was because they had a custom of swearing by these objects, and He intimates this custom near the end of His Gospel.
But mark, I pray thee, on what ground He magnifies the elements; not from their own nature, but from God's relation to them, such as it had been in condescension declared. For because the tyranny of idolatry was great, that the elements might not be thought worthy of honor for their own sake, He hath assigned this cause, which we have mentioned, which again would pass on to the glory of God. For He neither said, "because Heaven is beautiful and great," nor, "because earth is profitable;" but "because the one is God's throne, the other His footstool;" on every side urging them on towards their Lord.
"Neither by thy head," saith He, "because thou canst not make one hair white or black."
Here again, not as wondering at man, hath He withdrawn him from swearing by his head (for so man himself would be worshipped), but as referring the glory to God, and signifying that thou art not master even of thyself, and of course therefore not of the oaths made by thy head. For if no one would give up his own child to another, much more will not God give up His own work to thee. For though it be thy head, yet is it the property of another; and so far from being master thereof, thou shalt not be able to do with it, no not the least thing of all. For He said not, "Thou canst not make one hair grow;" but, "Not so much as change its quality."
"But what," it may be said, "if any one should require an oath, and apply constraint?" Let the fear of God be more powerful than the constraint: since, if thou art to bring forward such excuses, thou wilt keep none of the things which are enjoined.
Yea, for first with respect to thy wife thou wilt say, "what if she be contentious and extravagant;" and then as to the right eye, "what if I love it, and am quite on fire?" and of the unchaste look, "what then, if I cannot help seeing?" and of our anger against a brother, "what if I be hasty, and not able to govern my tongue?" and in general, all His sayings thou mayest on this wise trample under foot. Yet surely with regard to human laws thou darest not in any case use this allegation, nor say, "what then if this or that be the case," but, willing or unwilling, thou receivest what is written.
And besides, thou wilt never have compulsion to undergo at all. For he that hath hearkened unto those former blessings, and hath framed himself to be such as Christ enjoined, will have no such constraint to endure from any, being held in reverence and veneration by all.
"But let your yea, be yea; and your nay, nay: for that which exceedeth these cometh of the evil one."
What is it then that "exceeds yea" and "nay"? it is the oath, not the perjury. For this latter is quite acknowledged, and no man needs to learn that it is of the evil one; and it is not an excess, but an opposite: whereas an excess means something more, and added over and above: which kind of thing swearing is.
"What then," saith one, "was it of the evil one? and if it was of the evil one, how was it a law?" Well, this same thing thou wilt say concerning the wife also; how is that now accounted adultery, which was before permitted?
What now may one reply to this? That the precepts then uttered had reference to the weakness of them who were receiving the laws; since also to be worshipped with the vapor of sacrifice is very unworthy of God, just as to lisp is unworthy of a philosopher. That kind of thing accordingly was now laid down to be adultery, and swearing to be of the evil one, now that the principles of virtue have advanced. But if these things had been, from the first, laws of the devil, they would not have attained to so great goodness. Yea, for had those not been forerunners in the first place, these which we now have would not have been so easily received. Do not thou then require their excellency now, when their use is past: but then, when the time was calling for them. Or rather, if thou wilt, even now: yea, for now also is their virtue shown: and most of all for the very cause, by reason of which we find fault with them. For their appearing such now, is the greatest commendation of them. For had they not brought us up well, and made us meet for the reception of the greater precepts, they would not have appeared such.
Therefore as the breast, when it hath fulfilled all its part, and is dismissing the child to the more manly diet, after that appears useless; and the parents who before thought it necessary for the babe, now abuse it with ten thousand mockeries (and many even not content with words of abuse, anoint it also with bitter drugs; that when their words have not power to remove the child's unseasonable propensity towards it, the real things may quench their longing): so also Christ saith, that they are of the evil one, not to indicate that the old law is of the devil, but in order that with most exceeding earnestness He might lead them away from their ancient poverty.
But if the old law had belonged to the devil, it would not have led people away from idolatry, but rather would have drawn them on and cast them into it; for this did the devil desire. But now we see the opposite effect produced by the old law. And indeed this very thing, the oath, was ordained of old for this cause, that they might not swear by the idols. For "ye shall swear," saith He, "by the true God." They were then no small advantages which the law effected, but rather very great. For that they came unto the "strong meat," was the work of its care.
"What then," it may be said, "is not swearing of the evil one?" Yes, indeed it is altogether of the evil one; that is, now, after so high a rule of self-restraint; but then not so.
"But how," one may say, "should the same thing become at one time good, at another time not good?" Nay, I say the very contrary: how could it help becoming good and not good, while all things are crying aloud, that they are so: the arts, the fruits of the earth, and all things else?
See it, for example, taking place first in our own kind. Thus, to be carried, in the earliest age of life, is good, but afterwards pernicious; to eat food that hath been softened in the mouth, in the first scene of our life, is good, but afterwards it is full of disgust; to be fed upon milk and to fly to the breast, is at first profitable and healthful, but tends afterwards to decay and harm. Seest thou how the same actions, by reason of the times, appear good, and again not so? Yea, and to wear the robe of a child is well as long as you are a boy, but contrariwise, when you are become a man, it is disgraceful. Wouldest thou learn of the contrary case too, how to the child again the things of the man are unsuited? Give the boy a man's robe, and great will be the laughter; and greater the danger, he being often upset in walking after that fashion. Allow him to handle public affairs, and to traffic, and sow, and reap, and great again will be the laughter.
Note how He exalts the elements of the world, not from their own nature, but from the respect which they have to God, so that there is opened no occasion of idolatry.
Or; of evil, that is, from their weakness to whom the Law permitted the use of an oath. Not that by this the old Law is signified to be from the Devil, but He leads us from the old imperfection to the new abundance.
(Versed 34 onwards) But I say to you, do not swear at all: neither by heaven, for it is the throne of God; nor by the earth, for it is his footstool; nor by Jerusalem, for it is the city of the great King. Nor should you swear by your head, because you cannot make a single hair white or black. Let your word be 'Yes, yes' or 'No, no'; anything more than this comes from evil. The Jews have always had this wicked habit of swearing by the elements, as the prophetic word often accuses them (Isaiah 65). Whoever swears, worships, or loves the one by whom they swear. In the law it is commanded that we do not swear, except by the Lord our God (Deut. VI and VII). The Jews, by swearing by angels, and by the city of Jerusalem, and by the temple, and by the elements, honored and worshipped creatures and earthly things with the honor and worship due to God. Finally, consider that here the Savior did not prohibit swearing by God, but by heaven, and earth, and Jerusalem, and by your own head. And this was granted in the law as if to little children, so that just as they would sacrifice animals to God and not to idols, they would be allowed to swear by God: not that they would do this rightly, but because it was better to offer this to God than to demons. However, evangelical truth does not require an oath, since every faithful statement is considered as if made under oath.
This was allowed under the Law, as to children; as they offered sacrifice to God, that they might not do it to idols, so they were permitted to swear by God; not that the thing was right, but that it were better done to God than to dæmons.
Lastly, consider that the Saviour does not here forbid to swear by God, but by the Heaven, the Earth, by Jerusalem, by a man's head. For this evil practice of swearing by the elements the Jews had always, and are thereof often accused in the prophetic writing's. For he who swears, shows either reverence or love for that by which he swears. Thus when the Jews swore by the Angels, by the city of Jerusalem, by the temple and the elements, they paid to the creature the honour and worship belonging to God; for it is commanded in the Law that we should not swear but by the Lord our God.
Therefore Evangelic verity does not admit an oath, since the whole discourse of the faithful is instead of an oath.
For this reason Jesus prohibits us from swearing by heaven or by the earth. This is in order that we should not give to creation an honor surpassing creation. Do not deify creation. Those who swear, he says, “swear by the greater,” as the apostle has said. And he also forbids swearing by Jerusalem. For the earthly Jerusalem is a type of the Jerusalem above, and God swears only by himself, that is, by his own glory. Wherefore, since the similarity transcends us, we are obliged to swear neither by ourselves nor by our own glory, for we are not free like God but are subject to God’s authority.
For no man can swear often, but he must sometimes forswear himself; as he who has a custom of much speaking will sometimes speak foolishly.
Having forbidden swearing, He instructs us how we ought to speak, Let your speech be yea, yea; nay, nay. That is, to affirm any thing it is sufficient to say, 'It is so:' to deny, to say, 'It is not so.' Or, yea, yea; nay, nay, are therefore twice repeated, that what you affirm with the mouth you should prove in deed, and what you deny in word, you should not establish by your conduct.
Since the Jews had heard God say, "Heaven is My throne, and earth is My footstool" (Is. 66:1) they would swear by such things. In prohibiting them from swearing by these things, the Lord does not say, "Do not swear by them because heaven is good and great, and earth is useful." Instead He says, "Do not swear by them because the one is the throne of God and the other is His footstool," so that idolatry would not occur. For they might make gods out of those elements by which they swore, which indeed had happened before.
(non occ.) The Lord has hitherto taught to abstain from injuring our neighbour, forbidding anger with murder, lust with adultery, and the putting away a wife with a bill of divorce. He now proceeds to teach to abstain from injury to God, forbidding not only perjury as an evil in itself, but even all oaths as the cause of evil, saying, Ye have heard it said by them of old, Thou shall not forswear thyself. It is written in Leviticus, Thou shalt not forswear thyself in my name; (c. 19:12.) and that they should not make gods of the creature, they are commanded to render to God their oaths, and not to swear by any creature, Render to the Lord thy oaths; that is, if you shall have occasion to swear, you shall swear by the Creator and not by the creature. As it is written in Deuteronomy, Thou shall fear the Lord thy God, and shall swear by his name. (c. 6:13.)
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SUMMARY
Matthew 5:35, part of Jesus' profound Sermon on the Mount, expands on His teaching regarding oaths by prohibiting swearing by the earth or Jerusalem. This prohibition underscores God's absolute sovereignty over all creation, identifying the earth as His "footstool" and Jerusalem as "the city of the great King." Ultimately, Jesus' instruction aims to cultivate a radical integrity of speech among His followers, where external guarantees become unnecessary because their words are inherently truthful and reliable.
CONTEXT
EXPOSITION AND ANALYSIS
Key Word Analysis
Verse Breakdown
Literary Devices
Matthew 5:35 employs several powerful literary devices to convey Jesus' profound teaching. The most prominent is Metaphor, specifically in the phrase "it is his footstool." This vivid image, drawn from Old Testament passages such as Isaiah 66:1 and Psalm 110:1, effectively communicates God's absolute sovereignty and the subservient position of all creation before Him. The use of Parallelism in the two clauses ("Nor by the earth... neither by Jerusalem...") creates a balanced structure that reinforces the central message: both the earth and Jerusalem are God's, and therefore, oaths made by either are ultimately oaths before Him. There is also a strong element of Allusion to Old Testament theology, particularly regarding God's universal kingship and His special relationship with Jerusalem as His chosen city (e.g., Psalm 48:2). These allusions enrich the meaning, grounding Jesus' new teaching in established divine truths. Finally, the verse uses Hyperbole in the broader context of forbidding all oaths, pushing His listeners to understand that their speech should be so truthful that no external validation is ever needed.
THEOLOGICAL AND THEMATIC CONNECTIONS
Matthew 5:35 profoundly articulates God's absolute and comprehensive sovereignty over all creation. By declaring the earth His "footstool" and Jerusalem the "city of the great King," Jesus dismantles any human attempt to compartmentalize God's dominion or to create loopholes for dishonesty through a hierarchy of oaths. The verse teaches that all things, from the vastness of the earth to a specific holy city, are intimately connected to God and under His ultimate authority. Therefore, any oath, no matter how seemingly "minor," ultimately invokes the name and authority of the Almighty. This theological truth serves as the foundation for Jesus' call to radical honesty, where the integrity of one's word should be so complete that oaths become superfluous. It underscores that true righteousness extends beyond external legal compliance to an internal disposition of unwavering truthfulness, reflecting the very character of God.
REFLECTION AND APPLICATION
Matthew 5:35 challenges us to consider the profound implications of God's sovereignty for our everyday speech. If the entire earth and even sacred spaces like Jerusalem are utterly under God's dominion, then every word we utter, every promise we make, is spoken in His presence and under His watchful eye. This verse calls us to move beyond a legalistic avoidance of certain phrases to cultivate a heart of absolute integrity, where our inner truth aligns perfectly with our outward expression. It means living a life so consistently honest that our simple "yes" or "no" carries the full weight of our character, rendering oaths unnecessary. This principle fosters a deep reverence for God's ownership of all things and encourages us to honor Him not just in grand declarations, but in the mundane details of our conversations. It invites us to reflect God's truthfulness in a world often characterized by deception and half-truths, becoming people whose words are as reliable as God's own.
Questions for Reflection
FAQ
Why did people swear by the earth or Jerusalem, and why does Jesus forbid it?
Answer: In ancient Jewish society, people often swore by various entities (heaven, earth, Jerusalem, their own head) to lend credibility or weight to their statements. A system of hierarchical oaths had developed, where some believed that swearing by lesser things was less binding than swearing directly by God's name, creating loopholes for dishonesty. Jesus forbids this practice because He asserts that all things, whether the earth or Jerusalem, are ultimately God's property and under His sovereign rule. To swear by them is, therefore, an indirect oath by God Himself. His teaching aims to dismantle these evasions and call for absolute integrity in speech, where one's word should be inherently trustworthy without the need for any oath, as He concludes in Matthew 5:37.
What does the phrase "it is his footstool" signify?
Answer: The phrase "it is his footstool" is a powerful metaphorical image drawn from the Old Testament, found in passages like Isaiah 66:1 and Psalm 110:1. It signifies God's ultimate dominion, authority, and exalted position over all creation. A footstool is something humble and subservient, placed beneath the feet of a sovereign. By calling the earth God's footstool, Jesus emphasizes that the entire planet is utterly subject to God's rule, reinforcing the idea that any oath made by it is an oath made before the supreme King. Stephen also references this in his speech in Acts 7:49.
Is swearing by anything forbidden for Christians?
Answer: Jesus' teaching in Matthew 5:33-37 is not merely a prohibition against specific words but a call to a deeper level of integrity. The core principle is that a follower of Christ should be so consistently truthful that their simple "yes" or "no" is sufficient and completely reliable. The emphasis is on the sincerity and reliability of one's word, reflecting the character of God. While the New Testament does not explicitly forbid all forms of oaths (e.g., God Himself takes oaths, and Paul uses oath-like statements), Jesus' teaching pushes believers towards a standard of radical honesty where oaths become unnecessary because their character is their bond. James 5:12 echoes this sentiment, urging believers to let their "yes be yes, and your no, no."
CHRIST-CENTERED FULFILLMENT
Matthew 5:35, while seemingly a prohibition, ultimately points to the supreme sovereignty of God, which is perfectly embodied and fulfilled in Jesus Christ. Jesus Himself is the "great King" (as recognized by the Magi in Matthew 2:2), whose reign extends over all creation. The earth, which is God's footstool, is also the sphere of Christ's redemptive work and future reign. Through His incarnation, death, and resurrection, Christ has indeed brought all things under His feet (Ephesians 1:22), demonstrating His ultimate authority over sin, death, and the created order. He is the one by whom "all things were created, in heaven and on earth, visible and invisible... all things were created through him and for him" (Colossians 1:16). Furthermore, Jesus is the very embodiment of truth; He declared, "I am the way, and the truth, and the life" (John 14:6). His words are not merely reliable but are truth itself, and His entire life was a perfect "yes" to the will of God (2 Corinthians 1:20). The ultimate fulfillment of the sacredness of Jerusalem as "the city of the great King" is found in the New Jerusalem, where Christ Himself is the light and the Lamb, reigning eternally with His people (Revelation 21:2-3, Revelation 22:3-5). Thus, Jesus' teaching on oaths calls His followers to reflect His own perfect truthfulness, living as citizens of His eternal kingdom where integrity of speech is a natural outflow of their union with the King.