The State idea is not according to my heart. I cannot understand why it is needed. It is connected with narrow-minded and economic obstacles. I believe it is bad. I have always been against it.

All meaningful and lasting change starts first in your imagination and then works its way out. Imagination is more important than knowledge.

Unless Americans come to realize that they are not stronger in the world because they have the bomb but weaker because of their vulnerability to atomic attack, they are not likely to conduct their policy at Lake Success [the United Nations] or in their relations with Russia in a spirit that furthers the arrival at an understanding.

Learn from yesterday, live for today.

It is better to believe than to disbelieve; in doing you bring everything to the realm of possibility.

Science is the process of making obviously erroneous ideas less obviously erroneous.

I have remained a simple fellow who asks nothing of the world; only my youth is gone - the enchanting youth that forever walks on air.