"He who does not understand the supreme..." - Quote by Leonardo Da Vinci

“There is nothing which deceives us as much as our own judgement.”

“What is fair in men, passes away, but not so in art”

“Nature is the source of all true knowledge. She has her own logic, her own laws, she has no effect without cause nor invention without necessity.”

“We admit, in geometry, not only infinite magnitudes, that is to say, magnitudes greater than any assignable magnitude, but infinite magnitudes infinitely greater, the one than the other. This astonishes our dimension of brains, which is only about six inches long, five broad, and six in depth, in the largest heads.”

“But the creative principle resides in mathematics. In a certain sense, therefore, I hold true that pure thought can grasp reality, as the ancients dreamed.”

“Our account does not rob the mathematicians of their science... In point of fact they do not need the infinite and do not use it.”

“People have a need for certainty - and that need for certainty is in every human being, certainty that you can avoid pain, certainty that you can at least be comfortable. It's a survival instinct.”

“Doubt thou the stars are fire; Doubt that the sun doth move; Doubt truth to be a liar; But never doubt I love.”

“There is no permanence in doubt; it incites the mind to closer inquiry and experiment, from which, if rightly managed, certainty proceeds, and in this alone can man find thorough satisfaction.”