I believe in evidence. I believe in observation, measurement, and reasoning, confirmed by independent observers. I'll believe anything, no matter how wild and ridiculous, if there is evidence for it. The wilder and more ridiculous something is, however, the firmer and more solid the evidence will have to be.

The essential building block is...the true love that is impossible to define for those who have never experienced it and unnecessary to define for those who have.

To insult someone we call him 'bestial. For deliberate cruelty and nature, 'human' might be the greater insult.

The temptation was great to muster what force we could and put up a fight. It's the easiest way out, and the most satisfactory to self-respect--but, nearly invariably, the stupidest.

The age of the pulp magazine was the last in which youngsters, to get their primitive material, were forced to be literate.

During the century after Newton, it was still possible for a man of unusual attainments to master all fields of scientific knowledge. But by 1800, this had become entirely impracticable.

There is no Master but the Master,” he said, “and QT-1 is his prophet.