Borrowed wit is the poorest wit.

Depend on no man, on no friend but him who can depend on himself. He only who acts conscientiously toward himself, will act so toward others.

Those who speak always and those who never speak are equally unfit for friendship. A food proportion of the talent of listening and speaking is the base of social virtues.

Not every one who has the gift of speech understands the value of silence.

The proverbial wisdom of the populace in the street, on the roads, and in the markets instructs the ear of him who studies man more fully than a thousand rules ostentatiously displayed.

Don't speak evil of someone if you don't know for certain, and if you do know ask yourself, why am I telling it?

The enemy of art is the enemy of nature; art is nothing but the highest sagacity and exertion of human nature; and what nature will he honour who honours not the human?