a healthy work of art is one the choice of whose subject is conditioned by the temperament of the artist, and comes directly out of it. . . . An unhealthy work of art, on the other hand, is a work . . . whose subject is deliberately chosen, not because the artist has any pleasure in it, but because he thinks that the public will pay him for it. In fact, the popular novel that the public calls healthy is always a thoroughly unhealthy production; and what the public calls an unhealthy novel is always a beautiful and healthy work of art.
