Among the great things which are found among us the existence of Nothing is the greatest.
Leonardo da VinciThere is no higher or lower knowledge, but one only, flowing out of experimentation.
Leonardo da VinciPainting is poetry that is seen rather than felt, and poetry is painting that is felt rather than seen.
Leonardo da VinciOld age takes in part savoury wisdom for its food - see to that your old age will not lack in nourishment.
Leonardo da VinciAnd you who wish to represent by words the form of man and all the aspects of his membrification, relinquish that idea. For the more minutely you describe the more you will confine the mind of the reader, and the more you will keep him from the knowledge of the thing described. And so it is necessary to draw and to describe.
Leonardo da Vinci