The Doctrine of Original Sin

Discipleship School • Study Series

The Doctrine of Original Sin

A careful study of Romans 5:12 — mortality, not guilt, passed to all humanity.

By PS-Church • ESV & LXX

Romans 5:12 is the central biblical text for the doctrine of Original Sin. The text teaches that Adam's sin brought death into the world — but notice carefully what spread: death, not guilt. Adam's sin introduced mortality into humanity. The Greek phrase ἐφ’ ὧ (eph ho) can mean "so that" or "with the result that," emphasising the spread of death as the consequence, not the automatic transfer of guilt.

Traditional theology, following Augustine and later systematized by theologians like Millard Erickson, teaches that Adam's guilt is transmitted to all humans at conception. Erickson's "federal headship" model views Adam as humanity's representative whose guilt is imputed to all. While this view has been dominant in Western Christianity, it creates significant theological difficulties — most critically with the nature of Jesus' humanity.

If Adam's guilt is biologically inherited, Jesus — as a true descendant of David "according to the flesh" (Romans 1:3) — would have inherited it as well. Attempts to solve this by appealing to the virgin birth, the immaculate conception of Mary, or bypassing normal human descent are textually unsupported. The biblical witness is clear: Jesus was fully human, yet without sin (Hebrews 4:15). This is only coherent if guilt is not biologically transmitted.

Romans 5:12 teaches that mortality (death), not guilt, was passed to all humanity through Adam. The key grammatical note: ἐφ’ ὧ functions causally — death spread because all sinned (i.e., because mortality leads to the conditions in which sin becomes inevitable). Example: Jesus inherited mortality but not guilt. He died — but not because He sinned. He died because He took on real human flesh, which is mortal.

All humans, because of mortality and their resulting separation from God, inevitably sin and incur real personal guilt. Children who live long enough will eventually sin, fulfilling Romans 3:23. This is not inevitability imposed by guilt inherited at conception — it is the natural trajectory of finite, mortal creatures living in a world fractured by Adam's choice. Like a broken clock that will eventually fail, all humans will eventually sin.

Infants, unborn children, and the mentally incapacitated are not guilty before God because they have not willfully sinned. Sin, as consistently taught in Scripture, requires volition and personal rebellion against God's known will — which they cannot enact. This is not a liberal softening of sin; it is a consistent application of God's justice and mercy. God does not condemn those who have not transgressed.

Salvation for both sinners and innocents is possible only through Christ's resurrection. The same Adam-Christ contrast that explains universal death also explains universal resurrection hope: "For as in Adam all die, so also in Christ shall all be made alive" (1 Corinthians 15:22). The Book of Revelation's imagery of the "books of deeds" (Revelation 20:12) applies to those with a moral record of choices. Innocents are not found there — they are found in the Book of Life.

This view does not deny human depravity or the seriousness of sin. All humans are born into mortality and the practical inevitability of sin. But they are guilty only when they personally sin. Psalm 51:5 ("Behold, I was brought forth in iniquity, and in sin did my mother conceive me") means humans are born as sinners by nature — into a corrupted condition — not that they are guilty of Adam's specific act at conception.

Romans 5:18 states: "...one act of righteousness leads to justification and life for all men." Does this teach universal salvation? Paul clarifies immediately in verse 19: "...the many were made righteous." Christ's work is sufficient for all and effective for all innocents — but effective for adult sinners only for those who believe. The contrast is not universalism; it is the abundance of grace over the abundance of sin.

Original Sin is best understood as mortality and the inevitable trajectory toward sinning, not the transmission of Adam's legal guilt. This view:

✦ Preserves Jesus' true humanity and sinlessness
✦ Affirms God's justice in judging only personal sin
✦ Maintains God's mercy toward innocents
✦ Underscores the necessity of Christ's death and resurrection for all
✦ Is consistent with the full sweep of both LXX and New Testament teaching