Every company that has an economist working for him has one employee too many.
Very successful people say no to almost everything.
I am a better investor because I am a businessman, and a better businessman because I am no investor.
If you understood a business perfectly and the future of the business, you need very little in the way of a margin of safety.
If you don't know jewelry, know the jeweler.
If you lose money for the firm, I will be forgiving. If you lose reputation, I will be ruthless.