"Both Empedocles and Heraclitus held it for a truth that man could not be altogether cleared from injustice in dealing with beasts as he now does."

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Is man no more than this? Consider him well. Thou ow'st the worm no silk, the beast no hide, the sheep no wool, the cat no perfume. Here's three on's are sophisticated. Thou art the thing itself; unaccommodated man is no more than such a poor, bare, forked animal as thou art.

— William Shakespeare