Avoid connecting yourself with characters whose good and bad sides are unmixed and have not fermented together; they resemble vials of vinegar and oil; or palletts set with colors; they are either excellent at home and insufferable abroad, or intolerable within doors and excellent in public; they are unfit for friendship, merely because their stamina, their ingredients of character are too single, too much apart; let them be finely ground up with each other, and they are incomparable.
Johann Kaspar LavaterHe whom common, gross, or stale objects allure, and when obtained, content, is a vulgar being, incapable of greatness in thought or action.
Johann Kaspar Lavater