An hour-glass is a reminder not only of time's quick flight, but also of the dust to which we must at last return

Erudition can produce foliage without bearing fruit.

Ask yourself always: how can this be done better?

We have no words for speaking of wisdom to the stupid. He who understands the wise is wise already.

Of all the inventions of man I doubt whether any was more easily accomplished than that of a Heaven.

He marvelled at the fact that the cats had two holes cut in their fur at precisely the spot where their eyes were.

To write brashly about some things, it is almost necessary not to know much about them.