Lexicon

G0225 - aletheia

Strong's: G0225 · BLB lookup Pronunciation: al-ay'-thi-a Part of speech: feminine noun Root: a- (not / un-) + lēthō / lanthanō (to escape notice / be hidden), literally "un-hiddenness" / "non-concealment" NT occurrences: 109

Semantic range (Thayer / BDAG / TDNT)

Truth as correspondence to reality, Greek-philosophical sense
Truth as faithfulness / reliability, Hebrew emet sense (the LXX often renders emet with alētheia)
Truth as the gospel / the Christian message, the apostolic / NT theological sense
Truth as personal reality, Christ Himself as the truth (John 14:6)

The semantic range bridges Greek-philosophical and Hebrew-relational truth-concepts. Greek alētheia = unhiddenness, openness, what corresponds to reality. Hebrew emet = faithfulness, trustworthiness, reliability. The NT preserves both.

The Hebrew background, emet

The OT emet (אֱמֶת, H571) is closely paired with hesed (lovingkindness, see H2617 - hesed). The doublet hesed v'emet, "lovingkindness and truth", is one of the most-cited divine-attribute pairings (Ex 34:6; Ps 25:10; 26:3; 40:11; 57:3; 86:15).

Emet in Hebrew thought is relational fidelity, not just propositional correctness. God's truth is His covenant-faithfulness; His Word is true because He is reliable. The LXX renders emet with alētheia ~125 times.

Christological force, I am the truth (John 14:6)

John 14.6, egō eimi hē hodos kai hē alētheia kai hē zōē, "I am the way, and the truth, and the life."

Christ does not just teach truth; He is the truth. The Greek-philosophical idea (truth as correspondence with reality) and the Hebrew idea (truth as faithfulness) converge in Christ:

He is the correspondence, the perfect representation of the Father (Heb 1:3)
He is the faithful one, the One in whom God's promises are "Yes" (2 Cor 1:20)
He embodies divine truth in personal form

This is the Christian distinctive: truth is ultimately personal (relational with God / Christ), not just propositional (logical). Both dimensions are preserved.

Johannine alētheia density

John's Gospel and 1 John have the densest alētheia concentration in the NT (~50% of NT occurrences). Major Johannine uses:

John 1:14, 17, "grace and truth came through Jesus Christ"
John 4:23-24, "true worshipers will worship the Father in spirit and alētheia… God is spirit, and those who worship Him must worship in spirit and alētheia"
John 8:32, "you will know the alētheian, and the alētheia will set you free"
John 14:6, Christ as alētheia
John 14:17; 15:26; 16:13, the Pneuma tēs alētheias, "the Spirit of truth"
John 17:17, "Your word is alētheia"
John 18:37-38, Christ before Pilate: "for this I have come into the world, to testify to the alētheia"; Pilate: "what is alētheia?"

The Pilate question is the iconic clash: relativism / cynicism (Pilate) vs personal-incarnate Truth (Christ standing before him).

Truth and the Holy Spirit

The Spirit is the Spirit of truth (Jn 14:17; 15:26; 16:13). Three functions:

Guides into truth (Jn 16:13), the Spirit's pedagogical role
Bears witness to truth (Jn 15:26; 1 Jn 5:6), confirming and corroborating
Glorifies Christ as truth (Jn 16:14)

The Trinitarian shape: the Father is the source of truth; the Son is the truth incarnate; the Spirit is the agent who guides into truth.

Pauline alētheia

Paul develops alētheia in apologetic / soteriological contexts:

Romans 1:18, 25, humanity suppresses the truth in unrighteousness; exchanged the truth of God for a lie
Romans 2:8, those who do not obey the truth
Romans 9:1, Paul speaks the truth in Christ
2 Corinthians 4:2, manifestation of truth
2 Corinthians 13:8, "we can do nothing against the truth, but only for the truth"
Galatians 2:5, 14, the truth of the gospel
Ephesians 4:15, speaking the truth in love (alētheuontes en agapē)
Ephesians 6:14, the belt of truth
2 Thessalonians 2:10-12, those who refused the love of the truth
1 Timothy 2:4, God desires all to come to alētheias epignōsin
1 Timothy 3:15, the church as stylos kai hedraiōma tēs alētheias, "pillar and support of the truth"
2 Timothy 2:15, 25; 3:7-8; 4:4, extensive alētheia / counterfeit-truth contrast
Titus 1:1, "the knowledge of the truth which is according to godliness"

Paul's pattern: the gospel is the truth; Christians stand for it; opponents are characterized by their suppression / rejection of truth.

Apologetic / epistemic significance

Alētheia anchors:

Christian truth-claim, Christianity claims to be objectively true, not just one option among many
Anti-relativism, alētheia is not personal or cultural construct
Truth as personal-relational, bridges the Western Greek-philosophical and Hebrew-relational dimensions
The unity of doctrine and life, truth is to be known, believed, spoken, done, walked in (1 Jn 1:6)
Apologetic engagement with secular epistemology, the question Pilate asked ("what is truth?") is the modern question

Notable verses outside the corpus

Psalm 117:2, emet of the LORD endures forever (Hallel use)
Proverbs 23:23, "buy truth and do not sell it"
Isaiah 65:16, "the God of truth"
Daniel 4:37, "all His works are alētheia"

Patristic / scholarly note

Patristic engagement enormous; truth-language structures Trinitarian / Christological / apologetic discussions across the patristic period. Modern conservative engagement: D. A. Carson (The Gagging of God, 1996); Cornelius Van Til (presuppositional epistemology); Os Guinness (Time for Truth, 2000); Francis Schaeffer (True Truth, The God Who Is There, 1968).

The "Justified True Belief" tradition in contemporary epistemology engages alētheia via Plato's Theaetetus, the Greek philosophical heritage that Christianity inherited and transformed.

Notes

Lexical workspace for alētheia.