Vote for the man who promises least; he'll be the least disappointing.

Only as you do know yourself can your brain serve you as a sharp and efficient tool. Know your own failings, passions, and prejudices so you can separate them from what you see.

I have known men who could see through the motivations of others with the skill of a clairvoyant; only to prove blind to their own mistakes. I have been one of those men.

Never answer a critic, unless he's right.

Approach each new problem not with a view of finding what you hope will be there, but to get the truth.

Always do one thing less than you think you can do.

I get the facts, I study them patiently, I apply imagination.