Do not sit down and try to pump up repentance from the dry well of a corrupt nature.  It is contrary to the laws of your mind to suppose that you can force your soul into that gracious state.  Take your heart in prayer to Him who understands it and say, "Lord, cleanse it.  Lord, renew it.  Lord, work repentance in it." The more you try to produce penitent emotions in yourself, the more you will be disappointed.  However, if you believingly think of Jesus dying for you, repentance will burst forth.

~ Charles H. Spurgeon