The fruit of the tree of knowledge always drives man from some paradise or other; and even the paradise of fools is not an unpleasant abode while it is habitable.

The greatest obstacle to progress is not man's inherited pugnacity, but his incorrigible tendency to parasitism.

Experience is a good teacher, but her fees are very high.

Admiration for ourselves and our institutions is too often measured by our contempt and dislike for foreigners.

The happiest people seem to be those who have no particular cause for being happy except that they are so.

Literature flourishes best when it is half a trade and half an art.

No healthy civilization can ever be reared on a foundation of devitalized work.