You did something you should not have and are feeling lousy about it. Call it guilt; it is actually your conscience telling you to own up. It is not an exaggeration that conscience and virtue are two sides of the same coin. (Benjamin Franklin)
Human beings have one common goal and that is to be happy. The path to happiness is easy when one has good conscience. Good conscience nurtures and protects and is the secret to inner peace. We gain spiritual strength by having a clean conscience.
"It is the working man who is the happy man. It is the idle man who is the miserable man."