Dikaiosynē operates on multiple inseparable levels in the NT. (1) God's dikaiosynē: God's own covenant faithfulness, his righteous character, his justice in action — Romans 3:21–26 reveals that the cross is where God demonstrates his dikaiosynē by being both just and the one who justifies. (2) Imputed dikaiosynē: the righteousness of Christ credited to the believer's account by faith — "the righteousness of God through faith in Jesus Christ for all who believe" (Rom 3:22). This is the forensic core of Pauline soteriology: the sinner is declared righteous (not made righteous first) on the basis of Christ's perfect obedience. (3) Ethical dikaiosynē: the righteousness of life that flows from justification — "offer yourselves to God as instruments of dikaiosynē" (Rom 6:13). The Sermon on the Mount's "hunger and thirst for dikaiosynē" (Matt 5:6) encompasses both right standing and right living. The word is a scandal in both directions: it offends moralists by being freely given, and it offends antinomians by demanding to be lived out.
RIGHTEOUSNESS, n. ri'chusness. Purity of heart and rectitude of life; conformity of heart and life to the divine law. Righteousness, as used in Scripture and theology, in which it is chiefly used, is nearly equivalent to holiness, comprehending holy principles and affections of heart, and conformity of life to the divine law. It includes all we call justice, honesty and virtue, with holy affections.
2. Applied to God, the perfection or holiness of his nature; exact rectitude; faithfulness.
3. The active and passive obedience of Christ, by which the law of God is fulfilled, and his justice satisfied. In justification, this righteousness is imputed to believers by God.
4. A synonym for the plan of salvation; Jer 23:6, "the LORD our righteousness."
Two corruptions pull in opposite directions. The first: moralism — treating dikaiosynē as something achieved by personal virtue, turning righteousness into a spiritual résumé. This collapses the forensic dimension: the righteous man is not the man who has done enough, but the man who has been declared righteous by the Judge. The second: social reductionism — collapsing dikaiosynē into political or social justice categories, stripping it of its vertical (God-ward) and forensic (court-room) dimensions. While biblical justice has social implications, the NT word is first and foremost about covenant standing before a holy God, not a political program. The recovery of dikaiosynē requires holding the forensic and the ethical together: declared righteous by grace, now called to live righteously by the Spirit.
• Romans 3:21–22 — "But now the righteousness [dikaiosynē] of God has been manifested apart from the law…through faith in Jesus Christ for all who believe."
• 2 Corinthians 5:21 — "For our sake he made him to be sin who knew no sin, so that in him we might become the righteousness [dikaiosynē] of God."
• Matthew 5:6 — "Blessed are those who hunger and thirst for righteousness [dikaiosynē], for they shall be satisfied."
• Philippians 3:9 — "…not having a righteousness of my own that comes from the law, but…the righteousness from God that depends on faith."
• Romans 6:13 — "Present yourselves to God…and your members to God as instruments for righteousness [dikaiosynē]."
Greek word family (δικ- root): δίκη (dikē) — right, custom, justice (PIE *deyk- "to show, indicate") δίκαιος (dikaios, G1342) — just, righteous, right δικαιοσύνη (dikaiosynē, G1343) — righteousness, justice (92× in NT) δικαιόω (dikaioō, G1344) — to justify, declare righteous (39× in NT) δικαίωμα (dikaiōma, G1345) — righteous deed/requirement, ordinance δικαίωσις (dikaiōsis, G1347) — justification (Rom 4:25; 5:18) Hebrew equivalent: צֶדֶק (tsedeq, H6664) — rightness, righteousness, equity צְדָקָה (tsedaqah, H6666) — righteousness, justice, right conduct → Both words rooted in the idea of conforming to a norm/standard → Can mean both legal right standing AND ethical conduct → Tsedaqah also used for "charity" in rabbinic Hebrew — right action toward others LXX translates both primarily with dikaiosynē, preserving the full range.
• "The great exchange: he took our sin so that we might receive his dikaiosynē. This is not a legal fiction — it is the most decisive transaction in the cosmos."
• "Luther rediscovered that God's dikaiosynē in Romans 1:17 is not the righteousness by which God punishes sinners, but the righteousness by which God makes sinners righteous through faith. That discovery launched the Reformation."
• "Hungering for dikaiosynē (Matt 5:6) is not passive longing — it is the desperate appetite of a starving man. The Beatitude promises that such hunger will be satisfied, not sated with moralism, but fed with Christ himself."