The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth.

What is the meaning of human life, or of organic life altogether? To answer this question at all implies a religion.

At least once a day, allow yourself the freedom to think and dream for yourself.

Relativity teaches us the connection between the different descriptions of one and the same reality.

I find it difficult to believe that I belong to such an idiotic, rotten species - the species that actually boasts of its freedom of will, heroism on command, senseless violence, and all of the loathsome nonsense that goes by the name of patriotism.

We know nothing at all. All our knowledge is but the knowledge of schoolchildren. The real nature of things we shall never know.

I urge a willingness to reserve a place in rational science for non-rational wonder.