- “My personal external animations play only a minor role in my thoughts and my emotions.”
- “You see, wire telegraph is a kind of a 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 that there is no cat.”
- “Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.”
- “The most incomprehensible thing about the world is that it is comprehensible.”
- “I never think of the future – it comes soon enough.”