The main obstacle to a stable and just world order is the United States. [This idea] happens to coincide with the prevailing opinion in the world. And I think that's rather shocking for Americans to hear.

Just as the process of repealing national alcohol prohibition began with individual states repealing their own prohibition laws, so individual states must now take the initiative with respect to repealing marijuana prohibition laws.

The scope for improvement is infinite, precisely because perfection is unattainable.

Increase your bets when you are confident and scale down your positions when you don't have conviction.

Markets are imperfect. So you do need regulation, knowing that the regulators are also human.

I'm not doing my philanthropic work out of any kind of guilt, or any need to create good public relations. I'm doing it because I can afford to do it, and I believe in it.

I commissioned two political experts to advise me about what I could do to oppose the re-election of President Bush.