Fear of knowing is very deeply a fear of doing.

The best way to view a present problem is to give it all you've got, to study it and its nature, to perceive within it the intrinsic interrelationships, to discover the answer to the problem within the problem itself.

All of life is education and everybody is a teacher and everybody is forever a pupil.

What does 'happy' mean? Happiness is not a state like Vermont.

I have discovered the missing link between the anthropoid apes and civilized men. It's us!

False optimism sooner or later means disillusionment , anger and hopelessness.

The most beautiful fate, the most wonderful good fortune that can happen to any human being, is to be paid for doing that which he passionately loves to do.