• 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.

    Charles Sanders Peirce, Nathan Houser (1998). “The Essential Peirce: Selected Philosophical Writings”, p.48, Indiana University Press