You let the brush take over and in a way follow its own head, and in the brush doing what it's doing, it will stumble on what one couldn't by oneself.. .It's essential to fracture influences in the same way that free association in psychoanalysis helps to fracture one's social self-deceptions.
Notes from Wikiquote
Motherwell's description of the surrealist method of psychic automatism, or 'artful scribbling', as he called it and applied it always. It involved a kind of 'free association' in which the pen or brush was allowed to wander on the surface, free from and not directed by the conscious mind