Only two things are infinite, the universe and human stupidity, and I'm not sure about the former.
He who joyfully marches in rank and file has already earned my contempt. He has been given a large brain by mistake, since for him, the spinal cord would suffice.
All our science, measured against reality, is primitive and childlike -- and yet it is the most precious thing we have.
If you want to live a happy life, tie it to a goal. Not to people or things.
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Insanity--doing the same thing over and over again and expecting different results.
Yes, we have to divide up our time like that, between politics and equations. But to me our equations are far more important, for politics are only a matter of present concern. A mathematical equation stands forever.
You see, the wire telegraph is a kind of very, very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? And radio operates exactly the same way: you send signals here, they receive them there. The only difference is there is no cat.
When I examined myself, and my methods of thought, I came to the conclusion that the gift of fantasy has meant more to me than my talent for absorbing positive knowledge.