Darkness is absence of light. Shadow is diminution of light. - Leonardo da Vinci

The painter will produce pictures of little merit if he takes the works of others as his standard.

A painter without a brush is like a weasel without a tongue

If you wish to make a figure in marble, first make one of clay, and when you have finished it, let it dry and place it in a case which should be large enough, after the figure is taken out of it, to receive also the marble, from which you intend to reveal the figure in imitation of the one in clay.