“What is not started today is never finished tomorrow.”

“Whether one show one's self a man of genius in science or compose a song, the only point is, whether the thought, the discovery, the deed, is living and can live on.”

“A person hears only what they understand.”

“Duty is the demand of the hour.”

“He who cannot draw on three thousand years is living from hand to mouth.”

“I'd rather spend half an hour in the company of a top carpenter, than three hours in the company of an average brain surgeon”

“Expert knowledge is limited knowledge”

“To help other people, you've got to be able to help yourself. You go to a psychiatrist, and they're on this Prozac, Effexor, and antidepressants, you may have picked the wrong person. If you go to somebody who's broke who's selling you financial services, that might not be a good thing. You go to somebody who's fat to help you lose weight... And a lot of people ironically do these types of things.”