Example isn't another way to teach, it is the only way to teach.

Science can only ascertain what is, but not what should be, and outside of its domain value judgements of all kinds remain necessary.

The Constitution only guarantees the American people the right to pursue happiness. You have to catch it yourself. A table, a chair, a bowl of fruit and a violin; what else does a man need to be happy?

If you are out to describe the truth, leave elegance to the tailor.

Discussion and argument are essential parts of science; the greatest talent is the ability to strip a theory until the simple basic idea emerges with clarity.

Do not grow old, no matter how long you live.

One must console oneself with the thought that time has a sieve through which most of these important things run into the ocean of oblivion and what remains after this selection is often still trite and bad.