Not all things worth counting are countable and not all things that count are worth counting.

I believe that pipe smoking contributes to a somewhat calm and objective judgement in all human affairs.

The greatest knowledge a person can possess is the address of the local library.

Gradually the conviction gained recognition that all knowledge about things is exclusively a working-over of the raw material furnished by the senses. ... Galileo and Hume first upheld this principle with full clarity and decisiveness.

When you trip over love, it is easy to get up. But when you fall in love, it is impossible to stand again.

Without the sense of fellowship with men of like mind... life would have seemed to me empty.

Unless Americans come to realize that they are not stronger in the world because they have the bomb but weaker because of their vulnerability to atomic attack, they are not likely to conduct their policy at Lake Success [the United Nations] or in their relations with Russia in a spirit that furthers the arrival at an understanding.