Jealousy is sustained as often by pride as by affection.

Theories are private property, but truth is common stock.

Reply to wit with gravity, and to gravity with wit.

He that knows himself, knows others; and he that is ignorant of himself, could not write a very profound lecture on other men's heads.

We shall at all times chance upon men of recondite acquirements, but whose qualifications, from the incommunicative and inactive habits of their owners, are as utterly useless to others as though the possessors had them not.

Any one can give advice, such as it is, but only a wise man knows how to profit by it.

Success seems to be that which forms the distinction between confidence and conceit.