“If you teach a man anything, he will never learn.”

“We learn from experience that men never learn anything from experience.”

“When a man says money can do anything that settles it: he hasn't got any. When a man wants to murder a tiger he calls it sport when a tiger wants to murder him he calls it ferocity.”

“A man learns to skate by staggering about and making a fool of himself. Indeed he progresses in all things by resolutely making a fool of himself.”

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

“I learned long ago, never to wrestle with a pig, you get dirty; and besides, the pig likes it.”

“A learned man is an idler who kills time by study.”