You build on failure. You use it as a stepping stone. Close the door on the past. You don't try to forget the mistakes, but you don't dwell on it. You don't let it have any of your energy, or any of your time, or any of your space.
“When you put your total faith in God, no matter what happens, to a person who's a true believer, if you die, you know you're going to heaven to be with God.”
“But of all plagues, good Heaven, thy wrath can send, Save me, oh, save me, from the candid friend!”