The mind is just another muscle.

If people get all the sex they can handle, they're so happy and content they just sit around and smile. I mean, you never feel aggressive just after you've gotten laid, right? Lots of sex for everybody, that's a solution to the world's problems.

Life is a game. Money is how we keep score.

Where's the upside in opening your mouth?

Once you decide to do something, and you're pretty sure you're right, then you gotta go ahead and do it. Because if you piddle around, somebody else will beat you to it.

I lost 80 percent of my wealth and then gave away over half of the rest. So I'm a man of modest means now. But if you budget carefully and watch your expenditures, you can get by on a couple billion dollars.

The more good I do, the more money has come in. You have to learn to give. You're not born to give. You're born selfish.