A painting requires a little mystery, some vagueness, and some fantasy. When you always make your meaning perfectly plain you end up boring people.
The fascinating thing, is not to show the source of light, but the effect of light.
Taste! It doesn't exist. An artist makes beautiful things without being aware of it.
Painting is easy when you don't know how, but very difficult when you do.
It's easy to have talent at 20 but what is difficult is to have talent at 50.
In painting you must give the idea of the true by means of the false.