If you never heard opportunity knock, maybe you're never at home.

Be able to confide your innermost secrets to your mother and your innermost fears to your father.

Know why certain foods, such as truffles, are expensive. It's not because they taste best.

Know how to behave at a fine restaurant, which is a telltale measure of social maturity.

I love having ten times as much stuff to do as I can possibly find time to do. That way, I can pick the one-tenth that I want to do most. But if I only have enough to just occupy all my time, I'm stuck doing all of whatever stuff it happens to be.

Profit is what we have left after we make a donation to a worthwhile cause.

The chess player who develops the ability to play two dozen boards at a time will benefit from learning to compress his or her analysis into less time.