Greek
αἰώνιος
aiōnios
Eternal, everlasting, age-lasting
The Greek adjective for 'eternal' or 'everlasting.' Used 71 times in the NT, most famously in 'eternal life' (John 3:16) — referring not just to endless duration but to quality of life in God's age-to-come, beginning now and continuing forever.
Aionios (αἰώνιος) is the Greek adjective from 'aiōn' (age, era). Etymologically it refers to 'pertaining to an age.' In Classical Greek it could mean 'lasting an age' (a long time but not necessarily forever) or 'eternal.' In the NT it generally means eternal, everlasting — pertaining to the unending age to come. The Hebrew equivalent is 'olam' (age, forever). Aionios appears 71 times in the NT.
Aionios in the NT. (1) Eternal life. John 3:16 — 'whosoever believeth in him should not perish, but have everlasting [aiōnion] life.' John 17:3 — 'this is life eternal [aiōnios], that they might know thee.' Eternal life is not just endless duration but quality of life — knowing God. (2) Eternal punishment. Matthew 25:46 — 'these shall go away into everlasting [aiōnion] punishment: but the righteous into life eternal [aiōnion].' The same word for both destinations — life and punishment. Traditional Christianity affirms eternal punishment based on this and similar texts. (3) Eternal God. Romans 16:26 — 'the everlasting God.' 1 Timothy 1:17 — 'the King eternal.' God himself is eternal. (4) Eternal redemption / salvation. Hebrews 5:9 — Christ 'became the author of eternal salvation.' Hebrews 9:12 — 'having obtained eternal redemption for us.' (5) Eternal weight of glory. 2 Corinthians 4:17 — 'a far more exceeding and eternal weight of glory.' (6) Eternal kingdom. 2 Peter 1:11 — 'the everlasting kingdom of our Lord and Saviour Jesus Christ.' (7) Eternal covenant. Hebrews 13:20 — 'the blood of the everlasting covenant.' Debates about aionios. Some have argued aionios means 'age-lasting' rather than truly eternal — and therefore eternal punishment might not be unending. This is the position of universalists and some annihilationists. However: (a) The same word is used for eternal life — if punishment is not eternal, neither is life. (b) The standard NT scholarly understanding is that aionios in eschatological contexts means truly eternal. (c) Other terms confirm eternal duration (e.g., 'forever and ever' — eis tous aiōnas tōn aiōnōn — Revelation 14:11). Traditional Christianity affirms aionios eschatologically means truly eternal. Implications. (a) The God we serve is eternal. (b) Life in Christ is eternal — beginning now, never ending. (c) The kingdom is eternal. (d) Judgment is eternal — adding sober urgency to evangelism. (e) Eternal realities transcend the brief shadows of this life (2 Corinthians 4:17).
“For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.”
“And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.”
“And these shall go away into everlasting punishment: but the righteous into life eternal.”
“For our light affliction, which is but for a moment, worketh for us a far more exceeding and eternal weight of glory.”
“Now unto the King eternal, immortal, invisible, the only wise God, be honour and glory for ever and ever.”
“Neither by the blood of goats and calves, but by his own blood he entered in once into the holy place, having obtained eternal redemption for us.”
Receive eternal life in Christ (John 3:16). Live with eternity in mind. Don't trade eternal weight of glory for present comfort (2 Corinthians 4:17). Take seriously the eternal stakes — both for yourself and others (Matthew 25:46). The eternal God offers eternal life through Christ — accept and announce.
Aionios (αἰώνιος) is Greek for eternal, everlasting, or age-lasting. It appears 71 times in the NT, especially in 'eternal life' (John 3:16; 17:3). It refers both to endless duration and to quality of life in God's age-to-come. The same word is used for eternal life and eternal punishment (Matthew 25:46).
In eschatological contexts (referring to the age to come), yes — it means truly eternal. Some have argued it means just 'age-lasting,' but: (1) the same word is used for eternal life and punishment; (2) Greek scholarship generally affirms eternal duration; (3) other terms ('forever and ever') confirm endless duration. Traditional Christianity affirms aionios eschatologically means truly eternal.
John 17:3 — 'And this is life eternal, that they might know thee the only true God, and Jesus Christ, whom thou hast sent.' Eternal life is not just endless duration — it is the quality of life that comes from knowing God. It begins now (for the believer) and continues forever. Eternal life = relationship with God through Christ.
John 3:16 — 'whosoever believeth in him should not perish, but have everlasting life.' Through faith in Jesus Christ. John 5:24 — 'He that heareth my word, and believeth on him that sent me, hath everlasting life.' 1 John 5:13 — believers can know they have eternal life. Trust Christ; receive him; the eternal life is yours — beginning now.