Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

If men as individuals surrender to the call of their elementary instincts, avoiding pain and seeking satisfaction only for their own selves, the result for them all taken together must be a state of insecurity, of fear, and of promiscuous misery.

This is what the painter, the poet, the speculative philosopher, and the natural scientists do, each in his own fashion.

... the desire for truth must take precedence over all other desires.

I regard class differences as contrary to justice and, in the last resort, based on force.

The moon does not simply disappear when we are not looking at it.

Since that deluge of newspaper articles I have been so flooded with questions, invitations, suggestions, that I keep dreaming I am roasting in Hell, and the mailman is the devil eternally yelling at me, showering me with more bundles of letters at my head because I have not answered the old ones.