I think that intellectuals who end up in hell will have to read page proofs and check indexes there.

Two paradoxes are better than one they may even suggest a solution.

Really exotic methods of propulsion . . . will have to be devised to get there. How it will be done, I do not know. Whether it will be done, I am not quite certain. But I would bet it can be done.

A state-of-the-art calculation requires 100 hours of CPU time on the state-of-the-art computer, independent of the decade.

Today, nothing is unusual about a scientific discovery's being followed soon after by a technical application: The discovery of electrons led to electronics; fission led to nuclear energy. But before the 1880's, science played almost no role in the advances of technology. For example, James Watt developed the first efficient steam engine long before science established the equivalence between mechanical heat and energy.

Society's emissions of carbon dioxide may or may not turn out to have something significant to do with global warming-the jury is still out.

I claim that relativity and the rest of modern physics is not complicated. It can be explained very simply. It is only unusual or, put another way, it is contrary to common sense.