| Church Father (Before 5th Century) | Position on Conditional Immortality (CI) | Position on Eternal Conscious Torment (ECT) | Notes |
| Ignatius of Antioch (c. 35–107) | Conditional hints – speaks of life and immortality as gifts given only to believers | No explicit ECT teaching | Writings emphasize life in Christ rather than inherent immortality of the soul |
| Polycarp (c. 69–155) | Similar to Ignatius; destruction language | No explicit ECT teaching | His focus is on eternal life for the saved, not eternal torment |
| Justin Martyr (c. 100–165) | Explicit Conditionalism – teaches souls are mortal unless God grants immortality | Denied innate immortality of soul; did not affirm traditional ECT | Key quote: “Souls… die unless God wills them to exist.” (Dialogue with Trypho, 5) |
| Irenaeus (c. 130–202) | Conditionalism – Immortality only for the righteous; wicked face destruction | Opposed Platonic immortality | Key work: Against Heresies (Book 2, 34.3) |
| Theophilus of Antioch (c. 120–190) | Conditionalism – immortality as a gift | No clear ECT statement | Emphasized Adam’s mortality and immortality as granted in Christ |
| Athenagoras (c. 133–190) | Possible ECT | Some ambiguity | Discussed resurrection but unclear on eternal fate |
| Tertullian (c. 155–240) | ECT – one of the earliest strong proponents of eternal torment | Explicit affirmation of unending conscious punishment | Influenced by Stoic/Platonic soul immortality concepts |
| Hippolytus of Rome (c. 170–235) | Leans toward ECT | Resurrection of the wicked for torment | Less emphasis on soul immortality, but does not teach annihilation |
| Origen (c. 184–253) | Universalism tendencies (eventual restoration) | Rejected CI and traditional ECT | Famous for apokatastasis (ultimate reconciliation) |
| Cyprian of Carthage (c. 200–258) | Some destruction language, but unclear | Many interpret as ECT | Uses “eternal fire” imagery but without philosophical immortality language |
| Arnobius of Sicca (d. c. 330) | Explicit Conditionalism – wicked souls ultimately perish | Rejects traditional eternal torment | Called souls naturally mortal unless granted immortality |
| Lactantius (c. 250–325) | Conditionalism leaning – wicked destroyed | No strong ECT position | Spoke of “the wicked being consumed” rather than tormented forever |
| Athanasius (c. 296–373) | Focused on immortality in Christ | Some destruction language but no explicit CI | Typically seen as orthodox, but not an explicit ECT proponent |
| Basil the Great (c. 330–379) | ECT | Classical eternal punishment | Aligns with later Nicene orthodoxy |
| Gregory of Nyssa (c. 335–395) | Universalist tendencies | Rejected CI and ECT | Hoped for final restoration of all |
| John Chrysostom (c. 349–407) | ECT | Strong preacher of eternal torment | Influenced later medieval tradition |
| Augustine of Hippo (354–430) | ECT (strongest defender) | Immortality of the soul for all | Cemented ECT as Western orthodoxy |