When you look at a wall spotted with stains...you may discover a resemblance to various landscapes, beautiful with mountains, rivers, rocks, trees. Or again, you may see battles and figures in action, or strange faces and costumes, and an endless variety of objects which you could reduce to complete and well-drawn figures.

Let proportion be found not only in numbers and measures, but also in sounds, weights, times, and positions, and what ever force there is.

Feathers shall raise men even as they do birds towards heaven :- That is by letters written with their quills.

I have offended God and mankind because my work didn't reach the quality it should have.

The human being, creature of eyes, needs the image.

All thoughts start from emotions.

That which can be lost cannot be deemed riches.