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 think I may have become an actor to hide from myself. You can escape into a character.”
“It is the same with revolution; so long as the proper spirit is spreading amongst our young men, we are satisfied that it spreads without bombast or parade.”