"He who in reasoning cites authority is..." - Quote by Leonardo Da Vinci

“The motions of men must be such as suggest their dignity or their baseness.”

“You will never have a greater or lesser dominion than that over yourself.”

“Do not imitate one another's style. If you do, so far as your art is concerned you will be called a grandson, rather than the son of Nature.”

“I am very glad there are quite a number of people born with a gift and a liking for all of this; like great chessplayers who play sixteen games at once blindfold and die quite soon of epilepsy. Serve them right! I hope the Mathematicians, however, are well rewarded. I promise never to blackleg their profession nor take the bread out of their mouths.”

“It is a great mistake to think that the extremist is a better man than the moderate. Usually the difference is not that he is morally stronger, but that he is intellectually weaker. He is not more virtuous. He is simply more foolish.”

“To do nothing at all is the most difficult thing in the world, the most difficult and the most intellectual.”

“There is no learning without remembering.”

“How sweet to remember the trouble that is past.”

“One always begins to forgive a place as soon as it's left behind.”