It takes sixty-five thousand errors before you are qualified to make a rocket.

Science does not have a moral dimension. It is like a knife. If you give it to a surgeon or a murderer, each will use it differently.

For my confirmation, I didn't get a watch and my first pair of long pants, like most Lutheran boys. I got a telescope. My mother thought it would make the best gift.

Looking back, nothing seems so simple than a utopian vision realised.

To simply dismiss the concept of God as being unscientific is to violate the very objectivity of science itself.

In 1492 Columbus knew less about the far Atlantic than we do about the heavens, yet he chose not to sail with a flotilla of less than three ships. . . . So it is with interplanetary exploration: it must be done on the grand scale.

Get me a broom. I'll sweep my own office.