Who really said it
Happiness is an activity of the soul in accordance with virtue
This is genuine Aristotle — the defining formula of his ‘Nicomachean Ethics’ (Book I). W. D. Ross’s standard 1925 translation renders it “human good turns out to be activity of soul in accordance with virtue” (1098a16) and “happiness is an activity of soul in accordance with perfect virtue” (1102a5). The popular one-liner smooths this to “the soul” and drops “perfect,” but the thought and wording are unmistakably Aristotle’s.
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