1 Isocrates i. 47 has this distinction, as well as Aristotle.
2 Some philosophers, as Aristippus (Diogenes Laertius x. 1. 138), said that intelligence is a good only for its consequences, but the opening sentences of Aritotle's Metaphysics treat all forms of knowledge as goods in themselves.
3 Plutarch (1040 C) says that Chrysippus censured Plato for recognizing health as a good, but elsewhere Plato explicitly says that even health is to be disregarded when the true interests of the soul require it.
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