Partial knowledge is more triumphant than complete knowledge; it takes things to be simpler than they are, and so makes its theory more popular and convincing.
What a person is begins to betray itself when his talent weakens--when he stops showing what he can do. Talent, too, is ornamentation, and ornamentation, too, is a hiding place.
The destiny of the human race is to widen the gap separating it from the lower races of animals. Any code of morality which retains its permanence and authority after the conditions of existence which gave rise to it have changed, works against this upward progress of man.