In theory, practice should work like theory. In practice, it doesn't.

In theory there is no difference between theory and practice. In practice there is.

I'd find the fellow who lost it [million dollars], and, if he was poor, I'd return it.

Making predictions is tough. Especially for the future.

Buy a stock, if it goes up, sell it, if it goes down, don't buy it.

Yogi saw three of his players in the locker room wearing Cone Head hats. Yogi said, Those guys make a pair.

You should always go to other people's funerals, otherwise, they won't come to yours.