When one dots all the i's he ends by being boring. Even when painting from nature, one must compose. There are people who fancy that this is forbidden. Then if you have sense enough to see it, well, that is all there is to that. That is the values of dark and light and the values of color.
Imagination is more important than knowledge.
Knowledge is limited. Imagination encircles the world. I only paint the difference between things. This is the divine breath that animates them. In great art, this conflict is hidden, it is unresolved.