"Aristotle may be regarded as the cultural barometer of Western history. Whenever his influence dominated the scene, it paved the way for one of history's brilliant eras; whenever it fell, so did mankind."

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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.

— Henri Frederic Amiel