Sin is an important concept in religion.

What a shame! We can't go to the party tonight.

I have sinned in judging too quickly.

Original sin is an important theological concept in Christianity.

The capital sin of greed is considered one of the seven deadly sins.

Venial sin is considered less serious than mortal sin.

Having committed a mortal sin, the man bitterly repented.

The sinner repented for his mistakes.

The sinners have been forgiven.