He who floats with the current, who does not guide himself according to higher principles, who has no ideal, no convictions-such a man is... a thing moved, instead of a living and moving being-an echo, not a voice. The man who has no inner-life is a slave of his surroundings as the barometer is the obedient servant of the air.
Amiel's Journal: The Journal Intime of Henri-Frédéric Amiel; Tr., with an Introduction and Notes (ed. 1893)