In rivers, the water that you touch is the last of what has passed and the first of that which comes; so with present time. - Leonardo da Vinci

The painter who draws merely by practice and by eye, without any reason, is like a mirror which copies every thing placed in front of it without being conscious of their existence.

The atmosphere is blue by reason of the darkness above it because black and white make blue.

Tomaso of Florence. known as Masaccio, showed by his perfect works how those who took their nourishment from anything but nature, mistress of masters, were laboring in vain.