Via notes from the 2013 Daily Journal Annual Meeting:
Of course, there's going to be some failure in making the correct decisions. Nobody bats a thousand. I think it's important to review your past stupidities so you are less likely to repeat them, but I'm not gnashing my teeth over it or suffering or enduring it. I regard it as perfectly normal to fail and make bad decisions. I think the tragedy in life is to be so timid that you don't play hard enough so you have some reverses.