One has no right to love or hate anything if one has not acquired a thorough knowledge of its nature. Great love springs from great knowledge of the … - Leonardo da Vinci

If you condemn painting, which is the only imitator of all visible works of nature, you will certainly despise a subtle invention which brings philosophy and subtle speculation to the consideration of the nature of all forms — seas and plains, trees, animals, plants and flowers — which are surrounded by shade and light. And this is true knowledge and the legitimate issue of nature; for painting is born of nature — or, to speak more correctly, we will say it is the grandchild of nature; for all visible things are produced by nature, and these her children have given birth to painting. Hence we may justly call it the grandchild of nature and related to God.

When I did well, as a boy you used to put me in prison. Now if I do it being grown up, you will do worse to me.

L'esperienza è il solo insegnante in cui possiamo confidare.