Charles Sanders Peirce Quotes
Upon this first, and in one sense this sole, rule of reason, that in order to learn you must desire to learn, and in so desiring not be satisfied with what you already incline to think, there follows one corollary which itself deserves to be inscribed upon every wall of the city of philosophy: Do not block the way of inquiry.
Citations
Peirce, Charles Sanders. Collected Papers of Charles Sanders Peirce, Volume 1: Principles of Philosophy. Edited by Charles Hartshorne and Paul Weiss, Harvard University Press, 1931, p. 54.
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Charles Sanders Peirce was an American philosopher, logician, mathematician and scientist who is sometimes known as "the father of pragmatism".