Usually I commit to something in my head and then I start drawing.

Four ingredients of a good drawing: accurate shapes and relationships among them, interesting values, careful observation, and a clear vision of the result.

You go back to the drawing board, start all over again,

Don't draw what you see; use what you see to draw what you feel.

Drawing is the essence of art.

You have to do something when you're lying in bed. So you play with your mind.