Now is always the hardest time to invest.

Do not blame anybody for your mistakes and failures.

So efficient are the available instruments of slavery; fingerprints, lie detectors, brain washings, gas chambers; that we shiver at the thought of political change which might put these instruments in the hands of men of hate.

A man sentenced to death obtained a reprieve by assuring the king he would teach his majesty's horse to fly within the year - on the condition that if he didn't succeed, he would be put to death at the end of the year. "Within a year," the man explained later, "the king may die, or I may die, or the horse may die. Furthermore, in a year, who knows? Maybe the horse will learn to fly." My philosophy is like that man's. I take the long-range view.

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.

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

Don't speculate unless you can make it a full time job.