Weakness of attitude becomes weakness of character.

Don’t have any children. It makes divorce so much more complicated.

The ideals that have lighted my way and time after time have given me new courage to face life cheerfully, have been kindness, beauty, and truth.

I think and think for months and years. Ninety nine times, the conclusion is false. The hundredth time I am right.

Let every man be respected as an individual and no man idolized.

Common sense is the collection of prejudices acquired by age eighteen.

Out of intense complexities intense simplicities emerge.

Not everything that can be counted counts, and not everything that counts can be counted.

The intellect has little to do on the road to discovery. There comes a leap in consciousness, call it intuition or what you will, and the solution comes to you and you don't know how or why.

The most important thing is not to stop questioning. Curiosity has its own reason for existing. One cannot help but be in awe when he contemplates the mysteries of eternity, of life, of the marvelous structure of reality.

Strange is our situation here on Earth.

In my experience, the best creative work is never done when one is unhappy.

We must learn to see the world anew.

Try not to become a man of success, but rather a man of value.

The intuitive mind is a sacred gift and the rational mind is a faithful servant. We have created a society that honors the servant and has forgotten the gift.

I refuse to make money out of science... my laurel is not for sale.