Advice, as it always gives a temporary appearance of superiority, can never be very grateful, even when it is most necessary or most judicious. But for the same reason everyone is eager to instruct his neighbours. To be wise or to be virtuous is to buy dignity and importance at a high price; but when nothing is necessary to elevation but detection of the follies or faults of others, no man is so insensible to the voice of fame as to linger on the ground.