Richard Feynman as follows: “The first principle is that you must not fool yourself, and you’re the easiest person to fool. - Charlie Munger

I sought good judgment mostly by collecting instances of bad judgment, then pondering ways to avoid such outcomes.

We all are learning, modifying, or destroying ideas all the time. Rapid destruction of your ideas when the time is right is one of the most valuable qualities you can acquire. You must force yourself to consider arguments on the other side.

He also had a very interesting competitive strategy in the early days. He was like a prizefighter who wanted a great record so he could be in the finals and make a big TV hit. So what did he do? He went out and fought 42 palookas. Right? And the result was knockout, knockout, knockout — 42 times.