Paul invited the Corinthians to; “…cleanse ourselves from all filthiness of the flesh and the spirit, perfecting holiness in the fear of God.” (2 Corinthians 7:1)
Paul goes on to explain that sorrow from sins leads to repentance; “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. For godly sorrow worketh repentance to salvation not to be repented of: but the sorrow of the world worketh death.” (2 Corinthians 7:9-10)