Female friendship, indeed, is to a man the bulwark, sweetener, ornament, of his existence. To his mental culture it is invaluable; without it all his knowledge of books will never give him knowledge of the world.
—Montaigne.
Friendship is rarer than love and more enduring.
—Taylor.
Friends require to be advised and reproved, and such treatment, when it is kindly, should be taken in a friendly spirit.
—Cicero.