What is original sin?
The short answer
Original sin is the wounded condition every human being is born into because of the first turning-away from God at the dawn of the human family. It is not a personal crime we each committed, but a state we inherit — a humanity that has lost the fullness of grace it was meant to have, leaving us prone to sin and death. Baptism washes it away and restores the lost friendship with God.
Full explanation
Original sin is one of the most misunderstood ideas in the faith, partly because the word "sin" makes people assume each newborn is somehow personally guilty of a crime before they can even open their eyes. That is not what the Church teaches. There is a crucial difference between a sin you commit and a condition you inherit. The first human beings, at the origin of our race, were offered God's friendship and a life filled with grace, and they chose to grasp at being their own gods instead. What was lost in that choice was not lost for them alone — it was lost for the whole family that descended from them, the way a wound to the root affects every branch.
A picture helps. Imagine a great house built on a foundation that was meant to hold a priceless gift inside it. The first owners damaged the foundation, and every family who moves in afterward inherits the cracks — not because they swung the hammer, but because they live in the house as it now stands. They are born into a home that no longer holds what it was built to hold. That is closer to what original sin means: not personal guilt for someone else's act, but being born into a humanity that has lost the original gift of grace and now leans, all on its own, toward selfishness and away from God.
This is why we experience what the Church calls concupiscence — the stubborn inner pull toward what we know is wrong, the gap between the good we intend and the good we actually do. It is not that human nature became evil; God made us good, and we remain good and deeply loved. But our nature is now wounded. We get tired in the doing of good and find sin disturbingly easy. Anyone honest about their own inner life recognizes this tug-of-war, and original sin names where it comes from.
The point of the doctrine, though, is not to leave us staring at a crack. It exists to make sense of the rescue. Christ is the new beginning of the human family — what the first humans broke, he repairs from the inside, not by ignoring the damage but by pouring grace back into our nature. Baptism is where that healing first reaches a person: it wipes away original sin, restores the friendship with God, and makes us his adopted children. The wound to our desires can still ache afterward, like a healed bone that remembers the break, but the relationship itself is fully restored, and God gives the grace to keep growing toward him.
Why this matters
Original sin explains something everyone already feels: why doing good is so much harder than it should be, and why even the people with the best intentions still hurt each other. Without it, you are left blaming either yourself entirely (crushing) or no one at all (delusional). With it, you get an honest diagnosis and a real cure. It keeps us humble about our weaknesses and hopeful about grace at the same time — and it makes Christ's rescue mean something, because there was truly something to be rescued from.
Myth Common misunderstanding
The biggest misunderstanding is that original sin means babies are personally guilty, or that human beings are rotten to the core. Neither is true. We do not inherit the guilt of a personal act we never committed; we inherit a deprived condition — the absence of a grace we were meant to have. And human nature remains genuinely good and made in God's image, only wounded, not destroyed. Original sin is a missing inheritance, not a stain of personal wrongdoing.
Scripture connections
- Genesis 3:1-19 — the account of the first turning-away, where trust in God is traded for the desire to be like gods, with consequences that reach beyond the two individuals.
- Romans 5:12-19 — Paul's parallel between Adam, through whom sin and death entered the human family, and Christ, through whom grace and life are restored.
- Psalms 51:5 — the psalmist's confession of being caught in sinfulness from the very beginning of life, an early hint of an inherited condition.
- 1 Corinthians 15:21-22 — death comes through one man, life through Christ; the same family-wide logic.
Church teaching references
Reflect
When you notice the gap between the good you mean to do and what you actually do, does naming it "a wound to be healed" change how you respond to yourself?