The artist has a frame that is non-committal, it is empty. And he projects into that in the way of paints, something in the way of his own imaginative creation. It’s something of his own spirit that’s put forth there, and it bounces back to him in the way of telling his mind something of what his inner spirit is doing… and through that, he’s bringing up into the field of his consciousness potentials from his unconscious system… which makes transformation possible.
– Joseph Campbell