Today's science is tomorrow's technology.

Secrecy, once accepted, becomes an addiction.

The main purpose of science is simplicity and as we understand more things, everything is becoming simpler.

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

Physics without mathematics is meaningless.

When you come to the end of all the light you know, and it's time to step into the darkness of the unknown, faith is knowing that one of two things shall happen: either you will be given something solid to stand on or you will be taught to fly.

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.