You want to be greedy when others are fearful.

You could have these crazy Internet valuations in the late 1990s, but they prove themselves out in the market. The next day they were selling for more than they were the day before, and people said, you know, you're crazy if you don't get in on this. So it's very human.

I think it's terrible for people in effect to say that income from investment should be taxed at a much lower rate than income from labor.

I mean the whole economy just comes to a grinding halt. Competence in markets and in institutions, it's a lot like oxygen. When you have it, you don't even think about it. Indispensable. You can go years without thinking about it. When it's gone for five minutes, it's the only thing you think about. And the oxygen has been sucked out of the credit markets.

As long as you have markets, you'll have excesses. People went crazy with tulip bulbs. They went crazy with the South Sea Bubble, they went crazy internet stocks, they went crazy with the uranium stocks back when I was first getting started. I mean, you know, you're not going to change the human animal. And the human animal really doesn't get a lot smarter.

I mean people -- people don't get -- they don't get smarter about things that get as basic as greed and you can't stand to see your neighbor getting rich. You know you're smarter than he is, and he's doing these things, you know, and he's getting rich, and your spouse is getting unhappy with you because you aren't doing -- pretty soon you start doing it. And so you get what I call the natural progression, the three Is. The innovators, the imitators, and the idiots.

The commercial paper market, when that dries up, you know, that's just like sucking the blood out of the economic body of the United States.