What is sin, really?

"Sin" is one of those words that has been so flattened by religious and anti-religious usage that most people who use it — for or against — mean something narrower and weirder than what the Bible actually means by it. It is worth taking the word back from the caricatures, because the real concept is deeper and more useful than either side gives it credit for.

You do not have to be religious to follow this. The page is going to lay out, in plain language, what the Bible's writers actually meant by the word, which is more interesting than the cultural shorthand.

A short, honest answer

The Bible's actual concept of sin is closer to a broken relationship that distorts everything downstream than to a list of forbidden behaviors. The behaviors are a symptom. The condition is the deeper reality. Recovering the real concept makes both Christianity and a lot of your own life make more sense.

A few terms first

For readers without the background: the Bible is the collection of Jewish and Christian sacred texts. It was written in Hebrew, Greek, and a little Aramaic, and English translations carry their own choices. When this page references original-language words, it is naming what the original writers actually used.

The vocabulary the Bible actually uses

Several Hebrew and Greek words are translated "sin" in English. Each one is doing a different piece of work, and looking at them in their original sense is instructive.

• Hebrew chata' / Greek hamartia. The literal sense is to miss the mark — like an archer aiming at a target and not hitting it. This is the most common word for sin in both testaments. It is not primarily about being a bad person; it is about not being what you were aiming at, or what you were made for.
• Hebrew pesha'. Closer to rebellion or breach of covenant. The relational sense — you and the other party were in something together, and you broke it.
• Hebrew avon. Often translated iniquity — has the sense of being twisted, being out of alignment. The condition behind the actions.
• Greek parabasis. Stepping over a line — the legal/transgressional sense.
• Greek paraptoma. A trespass, a falling away — the moral failure sense.

Notice what is going on. The Bible uses a whole family of words for what English flattens into one. Sin in the Bible is not a single concept. It is a constellation of related things: missing what you were made for, breaching a relationship, being twisted out of alignment, crossing a known line, falling short of what you knew was right.

That is much more interesting than "things on a list."

The Bible's diagnosis, in three layers

The Bible's actual claim about sin runs deeper than misbehavior. It has three layers.

1. Sin as a condition we are in.

Paul (one of the earliest Christian writers), in his letter to Christians in Rome: "All have sinned and fall short of the glory of God." The verb tense matters — all have sinned. Not all sin sometimes. The Bible's claim is that something is wrong with the human condition itself, not just with our individual records. We are not basically good people who occasionally do bad things. We are people who have something wrong at the level of who we are, that manifests in what we do.

This is uncomfortable, but it is also one of the few pieces of religion that maps cleanly onto observed reality. Look at the news. Look at history. Look at honest accounts of your own inner life. Something is wrong with humans at a level deeper than poor parenting.

2. Sin as a relational breach.

The opening chapters of the Bible describe sin as a broken relationship with God before it is anything else. The first sin in the Bible is not adultery or murder; it is distrust — choosing to define good and evil for yourself instead of trusting the One who made you. Everything else that goes wrong follows from that primary breach. The ancient Hebrew prophet Isaiah captured the image: "All we like sheep have gone astray; we have turned every one to his own way." The picture is of running off in your own direction.

This is why merely changing your behavior does not fix sin in the biblical sense. You can change behaviors and still be running in your own direction, still distrusting, still defining good and evil for yourself.

3. Sin as what comes out of your heart.

Jesus (the Jewish religious teacher Christianity is built around, executed by the Roman government around 30 AD), in one of the gospel accounts of his life (the gospel of Mark), lists the things that defile a person: "evil thoughts, sexual immorality, theft, murder, adultery, greed, malice, deceit, lewdness, envy, slander, arrogance, folly. All these evils come from inside and defile a person." Notice where he locates the source: not in external rules being broken, but in what comes out of the heart. The actions are symptoms. The heart is the engine.

Paul, in a different letter (his letter to Christians in Rome), gives the most honest internal report of the condition: "For I do not do the good I want, but the evil I do not want is what I keep on doing… What a wretched man I am! Who will deliver me from this body of death?" This is a man who has thought hard about why he does what he does and concluded that the problem is deeper than he can solve himself. The Christian claim is that he is right.

What sin is NOT

It is worth being clear about what the Bible does not mean by sin:

It is not "anything that makes you feel bad." Healthy guilt about a real wrong is a signal. Constant guilty feelings about nothing in particular — false guilt — is a different problem. (See How do I stop feeling guilty.)

It is not "things our culture happens to disapprove of." Some Christian communities have built up "sin" lists with items that are not in the Bible (cultural conformity, political alignment, lifestyle preferences). That is overreach, and the Bible's writers would have been the first to push back.

It is not, primarily, about being a worse human than someone else. Paul's claim above — all have sinned — is leveling. The Christian view does not let you stack yourself above someone else; in front of God, you are in the same condition as the person you would like to feel superior to.

It is not unsolvable. Christianity's diagnosis of sin is bleak, but the diagnosis exists in order to make sense of the solution. The whole point of taking sin seriously is to make the cross — and the new life Christianity offers — necessary, intelligible, and good news.

Why this matters for the rest

The Christian gospel is structured to fit the actual condition, not a cartoon version of it. If sin is just "naughty behavior," the cross (the Roman execution by which Jesus was killed around 30 AD) is overkill. If sin is something more — a condition we are in, a relationship we have breached, a deep wrongness in our hearts — then the cross is exactly the right shape: a death that addresses what is actually wrong, not just what is on the surface.

A lot of people who reject Christianity reject the cartoon: the moralistic, behavior-policing, finger-wagging caricature. That caricature deserves to be rejected. The actual Christian doctrine of sin — and the actual Christian solution to it — is something different, and worth understanding before you decide what to do with it.

What about right now

If you are wrestling with the actual concept, or with the specific shapes it has taken in your own life, our chat is free, private, and in your language.

Where this comes from in the Bible

• Romans 3:23 — "all have sinned and fall short"
• Isaiah 53:6 — "each of us has turned to his own way"
• Jeremiah 17:9 — "the heart is deceitful above all things"
• Mark 7:20–23 — Jesus locates the source: from inside
• Romans 7:15–25 — Paul's honest report of the internal struggle
• 1 John 3:4 — "sin is lawlessness"