Charles Sanders Peirce

"A quality is something capable of being completely embodied. A law never can be embodied in its character as a law except by determining a habit. A quality is how something may or might have been. A law is how an endless future must continue to be."

"We one and all of us have an instinct to pray and this fact constitutes an invitation from God to pray."

"We should chiefly depend not upon that department of the soul which is most superficial and fallible (our reason) but upon that department that is deep and sure which is instinct."

"It is a common observation that those who dwell continually upon their expectations are apt to become oblivious to the requirements of their actual situation."

"In all the works on pedagogy that ever I read — and they have been many, big, and heavy — I don't remember that any one has advocated a system of teaching by practical jokes, mostly cruel. That, however, describes the method of our great teacher, Experience."

"Let it be considered that what is more wholesome than any particular belief is integrity of belief and that to avoid looking into the support of any belief from a fear that it may turn out rotten is quite as immoral as it is disadvantageous."

"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."

"It is the man of science, eager to have his every opinion regenerated, his every idea rationalized, by drinking at the fountain of fact, and devoting all the energies of his life to the cult of truth, not as he understands it, but as he does not yet understand it, that ought properly to be called a philosopher."