are identical with one another, whilst others resemble, and others are analogous to each other."48
It was evident to Aristotle that the nutritive and motor life or soul could not exist without the body: "Plainly those principles whose activity is bodily cannot exist without a body, e.g., walking cannot exist without feet. For the same reason they cannot enter from outside...."But the final problem,—"a question of the greatest difficulty," says Aristotle,—is: "When and how and whence is a share in reason acquired by those animals that participate in this principle? " His answer is, that, unlike the nutritive and motor life, the reason, the rational soul, alone enters from without and "alone is divine, for no bodily activity has any connexion with the activity of reason."
Modern biological psychology might not agree. Yet Aristotle's psychology was biological through and through. The soul with him was life; and life in its plant and animal activity was in and of the body and inseparable from it, save that only reason, the higher mind of man, was not of the body, but was divine. We still ask, what is divine? What is the body? What is reason?
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