What is sin?

Salvation & the GospelIn theological review

The short answer

Sin is anything in us or done by us that falls short of God's holy character and breaks his good law. The Bible treats it as more than mistakes: it is rebellion against a good God, missing the life we were made for, and it separates us from him until he puts it right.

The fuller answer

Sin is the Bible's word for human wrongdoing measured against God himself, not against other people. We may look respectable beside a neighbour, yet still fall short of the glory and goodness of God. Sin includes actions we know are wrong, attitudes we hide, and good we leave undone. It can be a deed, a word, a desire, or a settled direction away from God. That is why the Bible speaks of sin as both acts we commit and a condition we live in.

Everyone who practices sin practices lawlessness as well. Indeed, sin is lawlessness.

1 John 3:4 (BSB)

One clear definition calls sin lawlessness: a crossing of the line God has drawn because he knows what harms us and dishonours him. The third chapter of Genesis shows the pattern at the start. God's word is questioned, his goodness is doubted, his command is crossed, and shame, hiding and blame follow at once. Sin is therefore never only private. It damages trust with God, fractures relationships with people, and leaves the sinner needing forgiveness and a changed heart, not merely better habits.

for all have sinned and fall short of the glory of God,

Romans 3:23 (BSB)

Paul's summary is deliberately level. All have sinned. No nation, family, age or respectable background stands outside the sentence. That sounds severe until its purpose is seen: the same chapter that levels everyone also announces a righteousness from God, given through faith in Jesus Christ to all who believe. An honest naming of sin is not the end of the Christian message. It is the doorway into it, because a person who thinks he is only slightly unwell will never value the cure God actually offers.

Anyone, then, who knows the right thing to do, yet fails to do it, is guilty of sin.

James 4:17 (BSB)

James widens the definition in a searching way. Knowing the good we ought to do, and failing to do it, is also sin. That reaches the help withheld, the apology never made, the need noticed and passed by. The Christian answer is not to lower God's standard until we pass it, nor to despair under it. It is confession, repentance and faith in Christ, whose death deals with guilt, and whose Spirit begins the slow work of making people new from the inside.

Sources

Berean Standard Bible (BSB)

Review status: in-theological-review. Every Contend page passes a human theological review against the Statement of Faith before it is published as approved teaching. This section is in that queue.

Dig deeper

No answer here is a dead end. Follow the question on, test it in practice, or work the method yourself on the Dig deeper page.

What is the gospel?The gospel is the good news of what God has done in Jesus Christ: he died for our sins according to the Scriptures, he was buried, and he was raised on the third day according to the Scriptures. It is news before it is advice: a death that pays for sin, a resurrection that proves it, and a living Lord who is to be confessed, believed, and followed.How can I be saved?By grace through faith in Jesus Christ, and not by anything you contribute. Ephesians says it outright: it is the gift of God, not by works, so that no one can boast. To be saved is to turn from your sin, confess Jesus as Lord, and trust that God raised him from the dead for you. The rest of your life is learning to live from that gift.What is repentance?Repentance is a change of mind about sin and about God that turns into a change of direction. Peter's command joins both halves: repent and turn back, so that your sins may be wiped away. It is more than feeling sorry, which can evaporate by morning. It is agreeing with God about your sin, grieving it, and leaving it, trusting the mercy that meets you on the way back.Are we born sinful?Yes, in the Bible's teaching people are born with a fallen nature inherited from Adam, inclined away from God before they choose any particular act. Christians have explained the details differently, but the texts point to a need that begins at birth, which is why salvation is presented as new birth, not self improvement.What is faith?Faith is trusting God's word and God's Son with your whole weight. Hebrews defines it as the assurance of what we hope for and the certainty of what we do not see. It is not believing without evidence, and it is not mere agreement that something is true. It is the hand that receives what grace gives.Bible Character: AdamThe first man, formed by God from the dust of the ground and placed in the garden of Eden.Bible Character: EveThe first woman, built by God from Adam's rib, and the mother of all the living.Lesson: The big story of the BibleThe Bible is one story, not sixty-six separate ones. Walk the whole arc once, from creation to new creation, and every book you open will have a place to sit.