When you build a bridge, you insist that it can carry 30,000 pounds, but you only drive 10,000-pound trucks across it. And that same principle works in investing.
Every day that goes by, I mean, if you don't react to Pearl Harbor for a week or two weeks or three weeks, you're behind in the war that you otherwise would have fought.
I don't need 15 houses. Owning real estate doesn't mean much to me. I don't like to think about things like that. I don't need 12 boats, or even the world's largest boat with a crew of 80. I'd have to take care of them, to worry about them. I get a lot more fun out of life without all the bells and whistles.
But 300 million Americans, their lending institutions, their government, their media, all believed that house prices were going to go up consistently. And that got billed into a $20 trillion residential home market. Lending was done based on it, and everybody did a lot of foolish things.
If you understood a business perfectly and the future of the business, you would need very little in the way of a margin of safety. So, the more vulnerable the business is, assuming you still want to invest in it, the larger margin of safety you'd need. If you're driving a truck across a bridge that says it holds 10,000 pounds and you've got a 9,800 pound vehicle, if the bridge is 6 inches above the crevice it covers, you may feel okay, but if it's over the Grand Canyon, you may feel you want a little larger margin of safety.
Although we deal with probabilities and expectations, the actual results can deviate substantially from such expectations, particularly on a short-term basis.
The market system rewards me outlandishly for what I do, but that doesn't mean I'm any more deserving of a good life than a teacher or a doctor or someone who fights in Afghanistan.
Investing is the greatest business in the world because you never have to swing. You stand at the plate; the pitcher throws you General Motors at 47! U.S. Steel at 39! And nobody calls a strike on you. There's no penalty except opportunity. All day you wait for the pitch you like; then, when the fielders are asleep, you step up and hit it.