Michelangelo is a constructor, and Rafael an artist who, great as he is, is always limited by the model. When he tries to be thoughtful he falls below the niveau of his great rival.
Everything in nature is formed upon the sphere, the cone and the cylinder. One must learn to paint these simple figures and then one can do all that he may wish.
See how the light tenderly love the apricots, it takes them over completely, enters into their pulp, light them from all sides! But it is miserly with the peaches and light only one side of them.
