It is far more difficult... to know when to sell a stock than when to buy.

There is something about inside information which seems to paralyze a man's reasoning powers.

Approach each new problem not with a view of finding what you hope will be there, but to get the truth, the realities that must be grappled with. You may not like what you find. In that case you are entitled to try to change it. But do not deceive yourself as to what you do find to be the facts of the situation.

I'll give you the bottom 10% and the top 10% of any move if I get to keep the middle 80%.

Even when we know what is right, too often we fail to act. More often we grab greedily for the day, letting tomorrow bring what it will, putting off the unpleasant and unpopular.

Peace is never long preserved by weight of metal or by an armament race. Peace can be made tranquil and secure only by understanding and agreement fortified by sanctions. We must embrace international cooperation or international disintegration. 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.

When the outlook is steeped in pessimism, I remind myself, "Two and two still make four, and you can't keep humankind down for long."