Word Study for G18 (ἀγαθός)

agathós /ag-ath-os'/ Ask about this word

Roota primary word

Meaning"good" (in any sense, often as noun)

KJV usagebenefit, good(-s, things), well. Compare καλός.

Word Study

In depth

A plain-language study of agathós — the range of meaning it carries, how Scripture actually uses it, and where it points. Written for readers who don’t know the original language.

Core Meaning & Semantic Range

The Greek word agathós, represented by G18, is a primary term for "good" in any sense. Appearing 102 times across 90 unique verses, it frequently functions as a noun to describe good things, benefits, or goods. The word is often compared with G2570 kalós, which refers to what is good in appearance or use, whereas G18 denotes that which is intrinsically good.

The intrinsic nature of G18 extends beyond mere utility or moral uprightness to signify a fundamental rightness and beneficence. It describes that which is excellent in its very being and purpose, reflecting an ideal standard that is inherently wholesome and beneficial. This deep-seated quality can apply to objects, events, or character, but always carries an implication of inherent value and positive impact. For instance, Jesus' redirection of the title "Good Master" to God in Mark 10:18 implies that only God possesses this quality in an absolute, unconditioned sense, setting the ultimate benchmark for all other manifestations of G18. It is not simply useful or morally acceptable, but fundamentally sound and salutary in its essence.

Biblical Occurrences & Contextual Analysis

In scripture, G18 is used to define the character of God, humanity, and their actions. Jesus states that none is good but God alone Mark 10:18. This divine goodness is demonstrated through His provision, as He gives good things to those who ask Him Matthew 7:11 and sends rain on the evil and the good Matthew 5:45. The term also describes human character, as seen in the statement that a good man brings forth good from the good treasure of his heart Luke 6:45. Furthermore, it qualifies the actions of believers, who are created in Christ Jesus for good works Ephesians 2:10.

Beyond defining character and general works, G18 frequently qualifies the state of one's inner moral compass. The New Testament writers often link G18 with "conscience" (συνείδησις), presenting a "good conscience" as vital for spiritual integrity and faith. Believers are exhorted to maintain a "good conscience" 1 Timothy 1:5, 1 Timothy 1:19, which serves as a defense against false accusations and a witness to their conduct in Christ 1 Peter 3:16. This internal moral soundness is also a prerequisite for baptism, described as "the answer of a good conscience toward God" 1 Peter 3:21, highlighting its role in one's standing before the divine. Paul himself affirms having lived "in all good conscience before God" Acts 23:1. Furthermore, G18 is used to denote benefits or blessings, both temporal and spiritual, that are given by God or experienced by believers. Christ is presented as an high priest of "good things to come" Hebrews 9:11, emphasizing future eschatological blessings. The early church shared "all good things" Galatians 6:6, and believers are assured that "whatsoever good thing any man doeth, the same shall he receive of the Lord" Ephesians 6:8, underscoring the divine economy of reward and provision.

Related Words & Concepts

Several related words help clarify the biblical concept of goodness:

G2570 kalós (good, honest, well): This word is often used for that which is good in form or function, as opposed to the intrinsic quality of G18. It is used to describe the good ground that receives the word Luke 8:15.
G4190 ponērós (hurtful, evil, wicked): As the direct opposite of G18, this term highlights the moral contrast between good and evil. A good tree cannot bring forth evil G4190 fruit Matthew 7:17.
G2041 érgon (deed, labour, work): This word is frequently connected with G18 to describe righteous actions. Believers are called to be prepared for every good work 2 Timothy 2:21 and to be fruitful in them Colossians 1:10.
G2590 karpós (fruit): The outcome of a life is often described as fruit. The wisdom from above is full of mercy and good fruits James 3:17.
G19 agathōsýnē (goodness): This abstract noun directly refers to the quality of goodness derived from G18, emphasizing moral excellence and benevolent disposition as an inherent virtue, often listed as a fruit of the Spirit.
G15 agathopoiéō (to do good): This verb highlights the active expression of G18, focusing on the performance of beneficial or righteous deeds, underscoring the practical outworking of an intrinsically good character.

Theological Significance

The theological weight of G18 is significant, establishing a foundation for Christian ethics and soteriology.

The Divine Standard: God is the ultimate source and standard of goodness. Jesus redirects the title of "Good Master" to God, affirming that only He is inherently good Mark 10:18. Every good and perfect gift originates from Him James 1:17.
The Fruit of Regeneration: The capacity to produce what is truly good is a result of a transformed heart. A good man brings forth good things Matthew 12:35, and believers are God's workmanship, created for good works Ephesians 2:10.
Moral Obligation: Christians are commanded to pursue what is good. This includes having a good conscience 1 Timothy 1:5, doing good to all people Galatians 6:10, and overcoming evil with good Romans 12:21.
Eschatological Judgment: Actions will be judged based on this standard. At the judgment seat of Christ, each person will receive for the things done in the body, whether good or bad 2 Corinthians 5:10.
God's Sovereign Purpose: The pervasive goodness of God ensures that even in challenging circumstances, all things are orchestrated to work together for G18 for those who love Him, revealing His ultimate benevolent design and providential care Romans 8:28.
The Law's Intrinsic Goodness: While unable to justify, the Mosaic Law itself is declared to be "holy, and just, and good" Romans 7:12, reflecting God's perfect character and moral standard, even as it exposes humanity's inability to perfectly fulfill it Romans 7:13.

Summary

G18 stands as a pivotal concept in the New Testament, fundamentally defining the moral character of God and providing the ultimate standard for human conduct and divine interaction. It denotes an intrinsic, inherent goodness that is fundamentally wholesome, beneficial, and morally excellent, distinguishing it from mere functional or aesthetic appeal. This divine standard, uniquely embodied by God Himself, serves as the source of all "good things" and gifts, shaping the spiritual landscape of Christian thought and practice.

The application of G18 extends to human experience, manifesting in a transformed character that produces "good fruits" and engages in "good works," which are the very purpose for which believers are created in Christ Jesus. This goodness is not only external action, as seen in verbs like G15 agathopoiéō, but also an internal disposition, represented by the noun G19 agathōsýnē, and evidenced by a "good conscience" that aligns with God's will and fosters integrity. Even the divine Law, though incapable of salvation, is recognized as intrinsically G18, holy, and just, providing a clear revelation of God's perfect moral expectations.

Ultimately, G18 underscores God's sovereign benevolence, assuring believers that His overarching purpose works all things for their "good." It serves as the benchmark for righteous living, the foundation for Christian ethics, and the promise of eschatological blessings, all rooted in the grace of God who is uniquely and absolutely G18.

How the KJV Renders It

Translation

Strong’s lists the renderings but not their weight. These are counted from the King James text of the tagged verses — the bar under each is how often the translators actually reached for it. Select one to filter the occurrences below.

Grammatical Forms

Morphology

In the Greek New Testament, this word appears as an adjective and a noun across 103 occurrences, inflected in 21 grammatical forms — each row is one form, and the bar is how often it is that form. Select any form to read what each part of its name means, and to filter the occurrence list to it. These are this word’s own inflections, not words built from it — for those, see Related Words.

ἀγαθὸν
ἀγαθὰ
ἀγαθὸς
ἀγαθὴν
ἀγαθὸν
ἀγαθῷ
ἀγαθέ
ἀγαθῶν
ἀγαθοῦ
ἀγαθοῦ
ἀγαθάς
ἀγαθοὺς
ἀγαθόν;
ἀγαθοῖς
ἀγαθῇ
ἀγαθῆς
ἀγαθή
ἀγαθοῖς
ἀγαθῷ
ἀγαθῶν
ἀγαθά;

Related Words

4 entries in Strong’s name this word as their origin. These are its derivatives — a different relationship from the inflected forms above, which are this same word bent by grammar.

Other entries the study above points to — each one is drawn from a reference it makes. Follow the trail to see how the words connect.

Theographic Context

Context

The people, places, and span of history the verses containing this word touch on — drawn from the theographic tagging of Scripture. Select any name to isolate its verses in the occurrence list.

Biblical Distribution

Distribution

Appears in 90 verses across 21 of the 27 books. Most frequent in Romans (19 verses); never once in the other 6.

Matthew

Mark

Luke

John

Acts

Romans

2 Corinthians

Galatians

Ephesians

Philippians

Colossians

1 Thessalonians

2 Thessalonians

1 Timothy

2 Timothy

Titus

Philemon

Hebrews

James

1 Peter

3 John

Every Occurrence

Concordance

Every verse where the word is tagged in the King James text. Filter by book, by the English word the translators chose, by grammatical form, or search within the verses.

Sources. Definition and numbering: James Strong, Exhaustive Concordance of the Bible (1890). Morphology: STEPBible / Tyndale House (CC BY). Verse tagging: the King James text keyed to Strong’s numbers. Every count on this page is computed from the tagged corpus, not estimated.