Old books that have ceased to be of service should no more be abandoned than should old friends who have ceased to give pleasure.

A speculator is a man who observes the future, and acts before it occurs.

Science has taught us how to put the atom to work. But to make it work for good instead of for evil lies in the domain dealing with the principles of human dignity. We are now facing a problem more of ethics than of physics.

Everyone is entitled to be wrong about their opinions, but no one has the right to be wrong about their facts.

Never play tips from "insiders." They can't see the forest for the trees.

If a speculator is correct half of the time, he is hitting a good average. Even being right 3 or 4 times out of 10 should yield a person a fortune if he has the sense to cut his losses quickly on the ventures where he is wrong.

I am interested in physical medicine because my father was. I am interested in medical research because I believe in it. I am interested in arthritis because I have it.