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.
“I'm greedy for that satisfaction of doing something hard and knowing that, even though I was afraid I couldn't do it, that somehow I can deliver.”
“I have to ask Allah's forgiveness and not get angry, because they come to me out of love, and it's not fitting that I should turn to them in hatred.”