What is Repentance? To regret past sins; to change one's actions because of regretted past acts; when one feels sorry for sinning again God and asks His forgiveness with the intentions of changing -- this is repentance. 2 Corinthians 7:9-10  9 Now I rejoice, not that ye were made sorry, but that ye sorrowed to repentance: for ye were made sorry after a godly manner, that ye might receive damage by us in nothing. 10 For godly sorrow worketh repentance to salvation not to be repented of: but the sorrow of the world worketh death.