Wagner's music is made up of the sounds of Nature conventionalized. You hear the sighing of the breeze, the song of the birds, the cries of animals, the rush of the storm. Wagner's essay, entitled, "Art and Revolution," is the twin to the lecture, "Art and Socialism," by Morris; and in the "Art-Work of the Future," Wagner works out at length the favorite recurring theme of Morris: work is for the worker, and art is the expression of man's joy in his work. In Eighteen Hundred Forty-four, when Morris was ten years of age, Wagner wrote: "I compose for myself; it is just a question between me and my Maker. I grow as I exercise my faculties, and expression is a necessary form of spiritual exercise. How shall I live? Express what I think or feel, or what you feel? "No, I must be honest and sincere. I must, for the need of myself, live my own life, for work is for the worker, at the last. Each man must please himself, and Nature has placed her approbation on this by supplying the greatest pleasure men ever know as a reward for doing good work. I hate this fast-growing tendency to chain men to machines in big factories and deprive them of all joy in their efforts--the plan will lead to cheap men and cheap products. I set my face against it and plead for the dignity and health of the open air, and the olden time." This sort of talk led straight to Wagner's arrest in the streets of Dresden on the charge of inciting a riot; and it was the identical line of argument that caused the arrest of Morris in Trafalgar Square, London, when he was taken struggling to the station-house. Wagner was exiled and Morris merely "cautioned," placed under police surveillance and ostracized. The difference in time explains the difference in punishment. A century earlier and both men would have forfeited their heads.