Such are the aesthetics of Plato, put into the mouth of that mysterious Diotima, who was a wise woman in many branches of knowledge. As we read them nowadays we are apt to smile with incredulity not unmixed with bitterness. Is all this not mere talk, charming and momentarily elating us like so much music; itself mere beauty which, because we like it, we half voluntarily confuse with _truth_? And, on the other hand, is not the truth of aesthetics, the bare, hard fact, a very different matter? For we have learned that we human creatures will never know the absolute or the essence, that notions, which Plato took for realities, are mere relative conceptions; that virtue and truth are social ideals and intellectual abstractions, while beauty is a quality found primarily and literally only in material existences and sense-experiences; and every day we are hearing of new discoveries connecting our aesthetic emotions with the structure of eye and ear, the movement of muscles, the functions of nerve centres, nay, even with the action of heart and lungs and viscera. Moreover, all round us schools of criticism and cliques of artists are telling us forever that so far from bringing forth and educating true virtue, art has the sovereign power, by mere skill and subtlety, of investing good and evil, healthy and unwholesome, with equal merit, and obliterating the distinctions drawn by the immortal gods, instead of helping the immortal gods to their observance. Thus we are apt to think, and to take the words of Diotima as merely so much lovely rhetoric. But--as my previous chapters must have led you to expect--I think we are so far mistaken. I believe that, although explained in the terms of fantastic, almost mythical metaphysic, the speech of Diotima contains a great truth, deposited in the heart of man by the unnoticed innumerable experiences of centuries and peoples; a truth which exists in ourselves also as an instinctive expectation, and which the advance of knowledge will confirm and explain. For in that pellucid atmosphere of the Greek mind, untroubled as yet by theoretic mists, there may have been visible the very things which our scientific instruments are enabling us to see and reconstruct piecemeal, great groupings of reality metamorphosed into Fata Morgana cities seemingly built by the gods. And thus I am going to try to reinstate in others' belief, as it is fully reinstated in my own, the theory of higher aesthetic harmonies, which the prophetess of Mantineia taught Socrates: to wit, that through the contemplation of true beauty we may attain, by the constant purification--or, in more modern language, the constant selecting and enriching--of our nature, to that which transcends material beauty; because the desire for harmony begets the habit of harmony, and the habit thereof begets its imperative desire, and thus on in never-ending alternation. II.