“He who can, does. He who cannot, teaches. ”

“He who distinguishes the true savor of his food can never be a glutton; he who does not cannot be otherwise.”

“A teacher who cannot explain any abstract subject to a child does not himself thoroughly understand his subject; if he does not attempt to break down his knowledge to fit the child's mind, he does not understand teaching.”

“He continues to teach because it provides him with a livelihood; also because it teaches him humility, brings it home to him who he is in the world. The irony does not escape him: that the one who comes to teach learns the keenest of lessons, while those who come to learn learn nothing.”

“What's the point anyway — Of suffering, dying? It teaches us to live, boy. A man who does not struggle does not live, he survives.”

“The person who says he knows what he thinks but cannot express it usually does not know what he thinks.”