What does it mean? What is a healthy, or an unhealthy work of art? All terms that one applies to a work of art, provided that one applies them rationally, have reference to either its style or its subject, or to both together. From the point of view of style, a healthy work of art is one whose style recognises the beauty of the material it employs, be that material one of words or of bronze, of colour or of ivory, and uses that beauty as a factor in producing the æsthetic effect. From the point of view of subject, 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. In fine, a healthy work of art is one that has both perfection and personality. Of course, form and substance cannot be separated in a work of art; they are always one. But for purposes of analysis, and setting the wholeness of æsthetic impression aside for a moment, we can intellectually so separate them. An unhealthy work of art, on the other hand, is a work whose style is obvious, old-fashioned, and common, and 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 call an unhealthy novel is always a beautiful and healthy work of art. I need hardly say that I am not, for a single moment, complaining that the public and the public press misuse these words. I do not see how, with their lack of comprehension of what Art is, they could possibly use them in the proper sense. I am merely pointing out the misuse; and as for the origin of the misuse and the meaning that lies behind it all, the explanation is very simple. It comes from the barbarous conception of authority. It comes from the natural inability of a community corrupted by authority to understand or appreciate Individualism. In a word, it comes from that monstrous and ignorant thing that is called Public Opinion, which, bad and well-meaning as it is when it tries to control action, is infamous and of evil meaning when it tries to control Thought or Art.