Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. The sermon is the thunderbolt hurled from heaven to blast unrepentant sinners but more so righteous saints. 22 Repent therefore of this thy wickedness, and pray God, if perhaps the thought of thine heart may be forgiven thee. What is Repentance. There is allot of misunderstanding concerning repentance.
Some religious groups require self-privation and torture themselves as they do penance.
Repentance is not just being sorry for sin. To boys who broke windshield of a fellow's car. They were very arrogant about what they had done. The fellow told them that he was going to call the sheriff. They changed their attitude.