If the West can claim superiority in anything, it is . . . in science and scientific technique.

The universe may have a purpose, but nothing we know suggests that, if so, this purpose has any similarity to ours.

Is there any knowledge in the world which is so certain that no reasonable man could doubt it?

Every increase in knowledge requires an increase in wisdom

One of the symptoms of an approaching nervous breakdown is the belief that one's work is terribly important.

The twin conceptions of sin and vindictive punishment seem to be at the root of much that is most vigorous, both in religion and politics.

Science does not aim at establishing immutable truths and eternal dogmas; its aim is to approach the truth by successive approximations, without claiming that at any stage final and complete accuracy has been achieved.