Diversification is protection against ignorance. It makes little sense if you know what you are doing.
Warren BuffettManagers thinking about accounting issues should never forget one of Abraham Lincoln's favorite riddles: How many legs does a dog have, if you call a tail a leg? The answer: Four, because calling a tail a leg doesn't make it a leg.
Warren BuffettWe have to live with the rest of the world. And it's a mistake, in my view. Trade has generally developed in this country. We actually export 12 or 13 percent of our GDP. It was only 5 percent in 1970. But it benefits us. It benefits the rest of the world. It doesn't benefit the steelworker maybe in Ohio. And that's the problem that has to be addressed, because when you have something that's good for society, but terribly harmful for given individuals, we have got to make sure those individuals are taken care of.
Warren Buffett