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.
“My reading of history convinces me that most bad government results from too much government.”
“He 's ruthless only because of his ideals. Unfortunately he doesn't succeed. The thing fails and gets out of hand and takes charge of him. Idealism is the only excuse he could have and it's a great excuse.”