It is a fair question, and the usual Christian answer — "because you've sinned" — is usually delivered badly. The real issue is not whether you are a decent person. It is what you are being saved from, and who is doing the saving.

1. Good compared to what?. Every moral scale is calibrated somewhere. Compared to the worst people alive, almost anyone looks fine. Compared to God's own character — the standard Scripture actually uses — "all have sinned and fall short of the glory of God" (Romans 3:23). Jesus states the bar without softening it: "You therefore must be perfect, as your heavenly Father is perfect" (Matthew 5:48). That is not a bar anyone clears, which is the point.

2. Sin is a rupture, not a score. Scripture treats sin primarily as a broken relationship rather than a list of infractions. A man can be a good father, a good neighbor, and a good citizen, and still have betrayed his wife — and no amount of subsequent good behavior balances the ledger, because the thing damaged was not a total, it was a bond. That is what the gospel claims to repair (Romans 5:10-11).

3. One break ruins the whole. James is blunt: whoever keeps the whole law but fails in one point has become guilty of all of it (James 2:10). Paul says the same from the other direction — the law was never a ladder, because no one climbs it (Romans 3:20). If the standard is perfection, then "good enough" is not a lower bar. It is no bar at all.

4. A wage and a gift differ in kind. Paul draws the distinction sharply: to the one who works, wages are owed, not given; but to the one who does not work and trusts God, righteousness is a gift (Romans 4:4-5). "By grace you have been saved through faith... not a result of works, so that no one may boast" (Ephesians 2:8-9). A gift you must earn is not a gift. The whole architecture depends on it being unearnable.

5. Concede this: many atheists are morally better. It is true, and it is not a small concession. Plenty of nonbelievers are more generous, more honest, and kinder than plenty of churchgoers, and Jesus said the prostitutes and tax collectors were entering the kingdom ahead of the religious (Matthew 21:31). Christianity does not claim believers are nicer. It claims everyone is in the same boat and the boat is not rowed by niceness.

6. Turn: "good enough" has no fixed bar. Ask what the passing grade is. Better than average? Better than Hitler? Better than your neighbor? Every answer is arbitrary, and each one quietly lowers the bar until you clear it. Meanwhile your own outrage at injustice assumes a standard that is not a bell curve. If "good" just means "not the worst," then the word has lost the meaning you were using when you said you live a good life.

7. The issue is knowing, not performing. Jesus's harshest words are not to criminals but to impressive religious performers: "I never knew you" (Matthew 7:23). Notice the category — not "you weren't good enough," but "I never knew you." Heaven is not a prize for conduct; it is life with a person, and you cannot get a relationship by being impressive at someone.

8. What is asked is honesty, not a resume. The tax collector who beat his breast and said "God, be merciful to me, a sinner" went home justified; the man reciting his achievements did not (Luke 18:13-14). Repentance is not a moral performance review. It is agreeing with God about what you already know about yourself, and it is available to the person who has done nothing to deserve it.

The Christian claim is not that you are too bad to be accepted. It is that you are too proud to be rescued, and that the rescue is free precisely because it could not be earned. Whether you want it is a different question from whether it is true.

Sources: C.S. Lewis, Mere Christianity; Tim Keller, The Prodigal God; Paul Copan, Is God a Moral Monster?; N.T. Wright.