"Good means not merely not to do wrong, but rather not to desire to do wrong."

"By desiring little, a poor man makes himself rich."

"Do not trust all men, but trust men of worth the former course is silly, the latter a mark of prudence."

"Do not trust all men, but trust men of worth; the former course is silly, the latter a mark of prudence."

"The nature of catastrophe is, after all, reasonably unvarying in the way it ruins, destroys, wounds and devastates. But if something can be learned from the event - not least something as profound as the theory of plate tectonics - then it somehow puts the ruination into a much more positive light."

"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe."

"Goethe died in 1832. As you know, Goethe was very active in science. In fact, he did some very good scientific work in plant morphology and mineralogy. But he was quite bitter at the way in which many scientists refused to grant him a hearing because he was a poet and therefore, they felt, he couldn't be serious."

"I certainly saw science as a kind of calling, and one with as much legitimacy as a religious calling."