The health of society thus depends quite as much on the independence of the individuals composing it as on their close political cohesion.

One strength of the communist system of the East is that it has some of the character of a religion and inspires the emotions of a religion.

The question that drives me hazy is whether it is I or others who is crazy.

There is nothing divine about morality, it is a purely human affair.

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

The world as we have created it is a process of our thinking. It cannot be changed without changing our thinking.

To have security against atomic bombs and against the other biological weapons, we have to prevent war, for if we cannot prevent war every nation will use every means that is at their disposal; and in spite of all promises they make, they will do it. At the same time, so long as war is not prevented, all the governments of the nations have to prepare for war, and if you have to prepare for war, then you are in a state where you cannot abolish war.