The safest way to get what you want is to deserve what you want. - Charlie Munger

Therefore, if you interpret being true to yourself as requiring that you retain every notion of your youth, you will be safely underway, not only toward maximizing ignorance but also toward whatever misery can be obtained through unpleasant experiences in business.

Which models are the most reliable? Well, obviously, the models that come from hard science and engineering are the most reliable models on this earth. And engineering quality control — at least the guts of it that matters to you and me and people who are not professional engineers — is very much based on the elementary mathematics of Fermat and Pascal: It costs so much, and you get so much less likelihood of it breaking if you spend this much. It’s all elementary high school mathematics.

Three rules for a career: 1) Don't sell anything you wouldn't buy yourself. 2) Don't work for anyone you don't respect and admire. 3) Work only with people you enjoy.