Introduction — Faith
Faith (emunah) in the New Testament is not mere intellectual assent to doctrines: it is structural halakhah, a relational orientation and active trust that Paul and the other apostles command as the foundational practice of the believer. The Greek term pistis — faith, trust, faithfulness — translates the Hebrew emunah, which in the Old Testament tradition designated relational trust in God as the foundation of life (Hab 2:4: "the righteous shall live by his faith"). The NT brings this structure to fulfillment: faith is not a human acquisition but a gift of God (Eph 2:8) that demands an active and persevering response.
| Dimension of faith | Reference | Greek term | Content |
|---|---|---|---|
| Essential definition | Heb 11:1 | hypostasis | Real foundation of things hoped for |
| OT foundation | Rom 4:3 | elogisthē eis dikaiosynēn | Abraham believed, credited as righteousness |
| Justification | Rom 5:1 | dikaiōthentes ek pisteōs | Peace with God through faith |
| Origin | Rom 10:17 | ek akoēs | Faith arises from hearing the Word |
| Combat | 1Tim 6:12 | agōnizou | Active struggle for the faith |
| Faith and works | Jas 2:17 | nekrá | Faith without works is dead |
| Gift and response | Eph 2:8-9 | Theou to dōron | Grace received, not merited |
Hebrews 11:1 provides the most articulated theological definition: "faith is the assurance of things hoped for, the conviction of things not seen" (esti de pistis elpizomenōn hypostasis, pragmatōn elegchos ou blepomenōn). The term hypostasis — foundation, substance, underlying reality — indicates that faith is not wishful thinking but a relationship with an objective reality not yet visible. The term elegchos — demonstration, proof — indicates that faith carries epistemic value: it is real knowledge, not subjective illusion. Hebrews 11:6 radicalizes: "without faith it is impossible to please him; for whoever draws near to God must believe that he exists, and that he rewards those who seek him." The proserchomenos — the one who draws near — indicates an active movement: faith is not a passive position but a deliberate approach toward God. The Old Testament tradition grounds the same structure: Hab 2:4 ("the righteous shall live by his faith") was the verse Paul used as the foundation of the doctrine of justification (Gal 3:11; Rom 1:17).
Romans 4 is the foundational text on the structure of faith as justification. Paul begins from Gen 15:6: "Abraham believed God, and it was credited to him as righteousness" (elogisthē eis dikaiosynēn). The verb logizomai — to impute, to credit — is an accounting term: Abraham's faith is credited as righteousness, not accumulated merit. Romans 4:20-21 describes the psychological structure of heroic faith: "with respect to the promise of God, he did not waver in unbelief (ou diekrithē tē apistia), but was strengthened in faith, giving glory to God." The verb enedynamōthē — was made powerful, was strengthened — indicates that faith is a received force, not autonomously produced. Romans 5:1 formulates the result: "justified by faith, we have peace with God" (dikaiōthentes ek pisteōs eirēnēn echomen pros ton Theon) — peace with God is the direct effect of justification by faith.
Romans 10:17 provides the genesis of faith: "faith comes from hearing (ek akoēs) and hearing through the word of Christ" (dia rhēmatos Christou). The akoē — hearing, listening — indicates that faith arises from encounter with the proclaimed Word, not from rational deduction or autonomous mystical experience. The rhēma Christou — the word of Christ — is apostolic proclamation as vehicle of the Spirit. Faith is therefore a response to divine communication, not a human production. Galatians 3:11 radicalizes: "no one is justified before God by the law, because the righteous shall live by faith" (ho dikaios ek pisteōs zēsetai) — faith replaces the way of ritual observance as the foundation of righteousness before God. Galatians 3:26 adds the filial dimension: "you are all sons of God, through