The highest wisdom and the highest genius have been invariably accompanied with cheerfulness. We have sufficient proofs on record that Shakespeare and Socrates were the most festive companions.

I almost think it is the ultimate destiny of science to exterminate the human race.

A book that furnishes no quotations is ... no book-it is a plaything.

There are two reasons for drinking: one is, when you are thirsty, to cure it; the other, when you are not thirsty, to prevent it.