On the levels of politics and theology, beauty is perfectly compatible with nonsense and tyranny. Which is very fortunate; for if beauty were incompatible with nonsense and tyranny, there would be precious little art in the world. The masterpieces of painting, sculpture and architecture were produced as religious or political propaganda, for the greater glory of a god, a government or a priesthood. But most kings and priests have been despotic and all religions have been riddled with superstition. Genius has been the servant of tyranny and art has advertised the merits of the local cult. Time, as it passes, separates the good art from the bad metaphysics. Can we learn to make this separation, not after the event, but while it is actually taking place? That is the question.