Never ask a barber if you need a haircut.

Our system works. Over time, people will live better and better. We have a system that unleashes human potential, and now China has a system that unleashes human potential. We will have interruptions. We overshoot and undershoot sometimes, but your kids and grandkids will live better than you. Over time, we move ahead at a pretty damn rapid rate.

Knowing the edge of your competency is important. If you think you know more than you do, you will get in trouble.

The time to buy stocks is consistently over time. You should never buy your investments with the idea, 'I have to get a certain return.' You should look at the best return possible and learn to live with that. But you should not try to make your investments earn what you feel you need. It doesn't work that way. The stock doesn't know you own it.

A pin lies in wait for every bubble. And when the two eventually meet, a new wave of investors learns some very old lessons: First, many in Wall Street (a community in which quality control is not prized) will sell investors anything they will buy. Second, speculation is most dangerous when it looks easiest.

We've long felt that the only value of stock forecasters is to make fortune tellers look good. Even now, Charlie and I continue to believe that short-term market forecasts are poison and should be kept locked up in a safe place, away from children and also from grown-ups who behave in the market like children.

Do not save what is left after spending, but spend what is left after saving.