It is important to foster individuality, for only the individual can produce the new ideas.

No idea is conceived in our mind independent of our five senses [i.e., no idea is divinely inspired].

The conflict that exists today is no more than an old-style struggle for power, once again presented to mankind in semireligious trappings. The difference is that, this time, the development of atomic power has imbued the struggle with a ghostly character; for both parties know and admit that, should the quarrel deteriorate into actual war, mankind is doomed.

It is only men who are free, who create the inventions and intellectual works which to us moderns make life worth while.

The world as we see it is only the world as we see it. Others may see it differently.

There is no vaccine against stupidity.

With fame I become more and more stupid, which of course is a very common phenomenon.