And therefore it is necessary for a society in which works of art arise and are supported, to find out whether all that professes to be art is really art; whether (as is presupposed in our society) all that which is art is good; and whether it is important and worth those sacrifices which it necessitates. It is still more necessary for every conscientious artist to know this, that he may be sure that all he does has a valid meaning; that it is not merely an infatuation of the small circle of people among whom he lives which excites in him the false assurance that he is doing a good work; and that what he takes from others for the support of his often very luxurious life, will be compensated for by those productions at which he works. And that is why answers to the above questions are especially important in our time. What is this art, which is considered so important and necessary for humanity that for its sake these sacrifices of labour, of human life, and even of goodness may be made? “What is art? What a question! Art is architecture, sculpture, painting, music, and poetry in all its forms,” usually replies the ordinary man, the art amateur, or even the artist himself, imagining the matter about which he is talking to be perfectly clear, and uniformly understood by everybody. But in architecture, one inquires further, are there not simple buildings which are not objects of art, and buildings with artistic pretensions which are unsuccessful and ugly and therefore cannot be considered as works of art? wherein lies the characteristic sign of a work of art? It is the same in sculpture, in music, and in poetry. Art, in all its forms, is bounded on one side by the practically useful and on the other by unsuccessful attempts at art. How is art to be marked off from each of these? The ordinary educated man of our circle, and even the artist who has not occupied himself especially with æsthetics, will not hesitate at this question either. He thinks the solution has been found long ago, and is well known to everyone. “Art is such activity as produces beauty,” says such a man. If art consists in that, then is a ballet or an operetta art? you inquire. “Yes,” says the ordinary man, though with some hesitation, “a good ballet or a graceful operetta is also art, in so far as it manifests beauty.”