Sin
Anything that falls short of God's goodness — wrong actions, attitudes, or the underlying human condition of being turned away from God.
What they actually mean
“"Doing wrong — and, deeper than that, the bent toward wrong that everyone has."”
Heard in the wild
“We all struggle with sin.”
“That's not just a mistake, that's sin.”
The Lighter Side
The thing everyone assumes you know the definition of. Ask three Christians and you'll get three definitions and one list, and the list will include something you did on Tuesday.
The longer version
What it means
Sin, in Christian teaching, has two layers. The obvious one is wrong actions: lying, cheating, cruelty, greed, and the rest. The deeper one is a condition: a bent away from God and toward self that every person is born with and can't fix on their own. Christians call the first "sins" (plural) and the second "sin" (singular, sometimes "the sin nature" or "original sin"). When a preacher says everyone is a sinner, he means the second layer — not that everyone has done something terrible, but that no one is naturally pointed the right way.
The word's root in both Hebrew and Greek means "to miss the mark" — an archery image. Sin is falling short of the target, not just breaking a rule.
Why people say it
Because the whole Christian story depends on it. If nothing is wrong with people, Jesus is unnecessary. Christians name sin not because they enjoy guilt but because they believe it's the accurate diagnosis, and that a right diagnosis is what makes the cure make sense. That's why a Christian can say "I'm a sinner" without despair: the sentence is usually followed, spoken or unspoken, by "and I'm forgiven."
How to respond
If a Christian calls something you did a sin, they're using their moral vocabulary, and you're free to disagree. If they call themselves a sinner, they're not fishing for reassurance; "aren't we all" is a fine reply, and they'll probably laugh. Don't assume that someone who talks about sin is judging you. In the church, the most frequent target of the word is the speaker.
If you hear it in different churches
Universal, with different emphases. Catholics distinguish mortal sin (serious, deliberate, breaks the relationship with God) from venial sin (lesser) and have the sacrament of confession for dealing with both. Orthodox Christians tend to describe sin more as sickness than crime — a wound needing healing. Reformed and evangelical churches stress the depth of the condition ("total depravity"). All agree on the two layers.
Where does “Sin” come from?
The Hebrew chata and Greek hamartia both mean to miss a mark or go astray. Sin first appears by name in Genesis 4:7, where God warns Cain that "sin is crouching at your door." Paul's summary in Romans 3:23 — "all have sinned and fall short of the glory of God" — is the verse most often quoted. The doctrine of original sin, that the human condition itself is fallen from birth, was developed by Augustine in the 400s from Romans 5 and Psalm 51:5 and shaped all of Western Christianity; the Eastern church holds a related but softer view, "ancestral sin."
Good to know
Christians use "sin" more comfortably than outsiders expect, and usually about themselves. "Sinner" is not an insult in church — it's a category everyone's in. If you hear "the sin of…" followed by something you do, that's a description of a moral category, not a personal attack, though it can feel like one.
You might also hear
Repent
Salvation & ConversionTurning away from wrongdoing and toward God — a change of mind and direction, not just feeling bad about something.
“"I was headed the wrong way. I've turned around."”
Grace
Salvation & ConversionGod's undeserved kindness and forgiveness — receiving good you didn't earn and couldn't have.
“"Getting a gift you didn't earn — from God, specifically."”
The Fall
Bible & TheologyThe story in Genesis 3 of humanity's first disobedience — Adam and Eve eating the forbidden fruit — and the brokenness of the world and human nature that Christians believe followed.
“"The moment things went wrong, according to Genesis — and why the world still isn't right."”
Atonement
Bible & TheologyHow Jesus' death makes things right between God and people. Christians agree it does; they've written libraries on exactly how.
“"What the cross accomplished — the repair job between God and us."”
Common questions
Is sin the same as breaking a rule?+
Rules are involved, but Christians would say sin is deeper — a turning away from God and from the good, of which rule-breaking is a symptom.
Do Christians think they're better than everyone else?+
The teaching says the opposite: everyone is a sinner, including them. Christians who act superior are, by their own doctrine, forgetting that.
What's original sin?+
The belief that humans are born with a bent toward sin — not guilty of anything yet, but not neutral either. Catholics, Orthodox, and Protestants describe it a little differently but all hold some version.
Further reading
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Written by Rev. Christopher D.F. Warrington, Ordained Minister, M.Div. · Updated September 2026
This entry was compiled with AI assistance and has not yet been reviewed by an ordained pastor.