[Asked about a book in which 100 Nazi professors charged him with scientific error.] Were I wrong, one professor would have been quite enough.

Epistemology without contact with science becomes an empty scheme. Science without epistemology is-insofar as it is thinkable at all-primitive and muddled.

I know that philosophically a murderer is not responsible for his crime, but I prefer not to take tea with him.

Logic will get you from A to B. Imagination will take you everywhere.

Common sense needs constant reappraisal.

We should take care not to make the intellect our god; it has, of course, powerful muscles, but no personality.

I like the Swiss because by and large they are more humane than the other people aming whom I have lived.