Thinking is hard work; that's why so few do it.

I believe in standardizing automobiles, not human beings.

Most of the fundamental ideas of science are essentially simple, and may, as a rule, be expressed in a language comprehensible to everyone.

To raise new questions, new possibilities, to regard old problems from a new angle, requires creative imagination and marks real advance in science.

Don't wait for miracles, your whole life is a miracle.

The world will not evolve past its current state of crisis by using the same thinking that created the situation.

Mere thinking cannot reveal to us the highest purpose.