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 a comedian first. I've learned how to act. I just draw on life experiences and that's how I've learned. I didn't take classes or anything. I don't need no classroom.
In the depth of winter I finally learned that there was in me an invincible summer.