Part of the rational power of the human soul is passive: it is bound up with memory, and dies with the body that bore the memory; but the “active reason,” the pure power of thought, is independent of memory and is untouched with decay. The active reason is the universal as distinguished from the individual element in man; what survives is not the personality, with its transitory affections and desires, but mind in its most abstract and impersonal form.43 In short, Aristotle destroys the soul in order to give it immortality; the immortal soul is “pure thought,” undefiled with reality, just as
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