In: The Oracle

Warren Buffett:

To be a successful investor, you don’t need to understand higher math or law. It’s simple, but not easy. You do have to have an emotional stability that will take you through almost anything. If you have 150 IQ, sell 30 points to someone else. You need to be smart, but not a genius. What’s most important is inner peace; you have to be able to think for yourself. It’s not a complicated game.

Seems like a good management thought, too.