Repentance involves the changing of a person’s mind. When we feel sorry for what we have not done or what we have done then we are repentant. The dictionary defines repentance as feeling regret or being dissatisfied because of a past intent or action which resulted in changing of mind or of changing a person’s ways.
Repentance is Godly sorrow and to despise sin. Repentance is returning to the Lord and having a right attitude towards Him. Paul mentioned in 2 Corinthians 7:10 that Godly sorrow worketh repentance to salvation not to be repented of. There is nothing gloomy about repentance. When we repent we are to turn totally from whatever we are sorry for. This turning away means to turn totally away and never look back.
True repentance is followed by proving the change that has been professed. In the book of Acts, the people that repented brought books that were worth fifty thousand pieces of silver and burned them before all. In the First Thessalonians 1:9 the people proved their change by the turning away from idols and serving the true God.