Psalms 51:19

Psalms 51:19. Then shalt thou be pleased with the sacrifices of righteousness, with burnt offering and whole burnt offering: then shall they offer bullocks upon thine altar.

Never do men give so freely to the cause of God as when they are rejoicing over pardoned sin. Keep a deep sense of your indebtedness to God alive in your soul, and you will feel that you can never do enough for him who has forgiven you so much.