The combination of inharmonious colors has very often an inharmonious effect on the nerves, on the thought, on the mind; and this gives scope to those imaginative artists who are, however, without beauty, without art, without knowledge of life, without any psychological conception of it. It makes their art popular; by claiming that it is quite different from anything else, they can sell their art better. Art should be simple; it should be expressive; it should also be inspiring and revealing.