Simon

“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 S. Peirce

“He who is cruel to animals becomes hard also in his dealings with men. We can judge the heart of a man by his treatment of animals.”
― Emmanuel Kant

“A room without books is like a body without a soul.”
― Marcus Tullius Cicero

“He who laughs most, learns best”
― John Cleese