Nobody can think straight who does not work. Idleness warps the mind.

If I had asked people what they wanted, they would have said faster horses.

Be ready to revise any system, scrap any method, abandon any theory, if the success of the job requires it.

Patience and foresight are the two most important qualities in business

Anyone who stops learning is old — whether this happens at twenty or at eighty. Anyone who keeps on learning not only remains young but becomes constantly more valuable — regardless of physical capacity.

There are two extremes to be avoided: one is the attitude of contempt toward education, the other is the tragic snobbery of assuming that marching through an educational system is a sure cure for ignorance and mediocrity.

Thinking is hard work, which is why so few people do it.