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Aristotle is the champion of this world, the champion of nature, as against the supernaturalism of Plato. Denying Plato’s World of Forms, Aristotle maintains that there is only one reality: the world of particulars in which we live, the world men perceive by means of their physical senses. Universals, he holds, are merely aspects of existing entities, isolated in thought by a process of selective attention; they have no existence apart from particulars. Reality is comprised, not of Platonic abstractions, but of concrete, individual entities, each with a definite nature, each obeying the laws inherent in its nature. Aristotle’s universe is the universe of science. The physical world, in his view, is not a shadowy projection controlled by a divine dimension, but an autonomous, self-sufficient realm. It is an orderly, intelligible, natural realm, open to the mind of man.

In such a universe, knowledge cannot be acquired by special revelations from another dimension; there is no place for ineffable intuitions of the beyond. Repudiating the mystical elements in Plato’s epistemology, Aristotle is the father of logic and the champion of reason as man’s only means of knowledge. Knowledge, he holds, must be based on and derived from the data of sense experience; it must be formulated in terms of objectively defined concepts; it must be validated by a process of logic.

Copyright © 1986 by Harry Binswanger. Introduction copyright © 1986 by Leonard Peikoff. All rights reserved. For information address New American Library.

Acknowledgments

Excerpts from The Ominous Parallels, by Leonard Peikoff. Copyright © 1982 by Leonard Peikoff. Reprinted with permission of Stein and Day Publishers. Excerpts from The Romantic Manifesto, by Ayn Rand. Copyright © 1971, by The Objectivist. Reprinted with permission of Harper & Row, Publishers, Inc. Excerpts from Atlas Shrugged, copyright © 1957 by Ayn Rand, The Fountainhead, copyright © 1943 by Ayn Rand, and For the New Intellectual, copyright © 1961 by Ayn Rand. Reprinted by permission of the Estate of Ayn Rand. Excerpts from Philosophy: Who Needs It, by Ayn Rand. Copyright © 1982 by Leonard Peikoff, Executor, Estate of Ayn Rand. Reprinted by permission of the Estate of Ayn Rand. Excerpts from “The Philosophy of Objectivism” lecture series. Copyright © 1976 by Leonard Peikoff. Reprinted by permission. Excerpts from Alvin Toffler’s interview with Ayn Rand, which first appeared in Playboy magazine. Copyright © 1964. Reprinted by permission of Alvin Toffler. All rights reserved including the right of reproduction in whole or in part in any form. Used by arrangement with Plume, a member of Penguin Group (USA), Inc.