Man has to awaken to wonder - and so perhaps do peoples. Science is a way of sending him to sleep again.

Death is not an event in life: we do not live to experience death. If we take eternity to mean not infinite temporal duration but timelessness, then eternal life belongs to those who live in the present.

Mathematics is a logical method. . . . Mathematical propositions express no thoughts. In life it is never a mathematical proposition which we need, but we use mathematical propositions only in order to infer from propositions which do not belong to mathematics to others which equally do not belong to mathematics.

How hard I find it to see what is right in front of my eyes!

An honest religious thinker is like a tightrope walker. He almost looks as though he were walking on nothing but air. His support is the slenderest imaginable. And yet it really is possible to walk on it.

Courage, not cleverness; not even inspiration, is the grain of mustard that grows up to be a great tree.

How small a thought it takes to fill a life.