Prior Certainty of Consciousness

Descartes began with the basic epistemological premise of every Witch Doctor (a premise he shared explicitly with Augustine): “the prior certainty of consciousness,” the belief that the existence of an external world is not self-evident, but must be proved by deduction from the contents of one’s consciousness—which means: the concept of consciousness as some faculty other than the faculty of perception—which means: the indiscriminate contents of one’s consciousness as the irreducible primary and absolute, to which reality has to conform. What followed was the grotesquely tragic spectacle of philosophers struggling to prove the existence of an external world by staring, with the Witch Doctor’s blind, inward stare, at the random twists of their conceptions—then of perceptions—then of sensations.

When the medieval Witch Doctor had merely ordered men to doubt the validity of their mind, the philosophers’ rebellion against him consisted of proclaiming that they doubted whether man was conscious at all and whether anything existed for him to be conscious of.

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


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.