Imagination is greater than knowledge.

Man, surrounded by facts, permitting himself no surprise, no intuitive flash, no great hypothesis, no risk, is in a locked cell. Ignorance cannot seal the mind and imagination more securely.

The man with the greatest soul will always face the greatest war with the low minded person.

In quitting this strange world he has once again preceded me by a little. That doesn't mean anything. For those of us who believe in physics, this separation between past, present, and future is only an illusion, however tenacious.

I do not much believe in education. Each person ought to be his or her own model, however frightful that may be.

Don't dream of being a good person, be a human being is valuable and gives value to life.

My deep religiosity [...] found an abrupt ending at the age of twelve, through the reading of popular scientific books.