For Aristotle, life is not an inexplicable, supernatural mystery,but a fact of nature. And consciousness is a natural attribute ofcertain living entities, their natural power, their specific modeof action—not an unaccountable element in a mechanisticuniverse, to be explained away somehow in terms of inanimatematter, nor a mystic miracle incompatible with physical reality,to be attributed to some occult source in another dimension.For Aristotle, ‘living’ and ‘knowing’ are facts of reality; man'smind is neither unnatural nor supernatural, but natural—andthis is the root of Aristotle's greatness, of the immeasurabledistance that separates him from other thinkers.Life—and its highest form, man's life—is the central fact inAristotle's view of reality. The best way to describe it is to saythat Aristotle's philosophy is ‘biocentric’.This is the source of Aristotle's intense concern with thestudy of living entities, the source of the enormously ‘pro‐life’attitude that dominates his thinking.Ayn Rand, ‘Review of Randall’s Aristotle’