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 tend to regard the Coase theorem as a stepping stone on the way to an analysis of an economy with positive transaction costs.
The past is a stepping stone, not a millstone.
Kids are meant to believe that their stepping stone to massive money is 'The X Factor.' Luck is great, but most of life is hard work. We do not celebrate people who have made success out of serious hard work.
No individual is alone responsible for a single stepping stone along the path of progress, and where the path is smooth progress is most rapid.