An artist must never be a prisoner. Prisoner? An artist should never be a prisoner of himself, prisoner of style, prisoner of reputation, prisoner of success, etc. Henri Matisse
An artist must possess Nature. He must identify himself with her rhythm, by efforts that will prepare the mastery which will later enable him to express himself in his own language. Henri Matisse
Any material may be used but the theme is the same and the response is the same for all artwork... we all have the same concern, but the artist must know exactly what the experience is. He must pursue the truth relentlessly. Agnes Martin