Prediction is difficult, especially the future.

Anyone who can contemplate quantum mechanics without getting dizzy hasn't understood it.

Those who are not shocked when they first come across quantum theory cannot possibly have understood it.

It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we say about nature.

We all know your idea is crazy. The question is whether it is crazy enough.

The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.

All rising curves that show unwelcome trends in human affairs will approach infinity if extended far enough, but it is we who dictate the curve and not vice versa.