If a scientist were to cut his ear off, no one would take it as evidence of a heightened sensibility.

Science is the art of the solvable.

I cannot give any scientist of any age better advice than this: the intensity of a conviction that a hypothesis is true has no bearing over whether it is true or not.

Scientists are people of very dissimilar temperaments doing different things in very different ways. Among scientists are collectors, classifiers and compulsive tidiers-up; many are detectives by temperament and many are explorers; some are artists and others artisans. There are poet-scientists and philosopher-scientists and even a few mystics.

An experiment not worth doing is not worth doing well.

[A certain class of explanations in science are] analgesics that dull the ache of incomprehension without removing the cause.

The alternative to thinking in evolutionary terms is not to think at all.