Every great artist has tasted the sweet poison of the Forbidden Fruit. The Serpent, the most "subtile" of all the Beasts, gave an apple he had gathered from the Tree of the Knowledge of Good and Evil to Eve; she having eaten it and having given one to Adam, both saw they were naked, and, with nakedness, Sin entered into the World. Now, what was stolen from the Garden of God has, ever since, been the one temptation which it is almost impossible to resist. For instance Shakespeare stole from Marlowe, Milton stole from Shakespeare, Keats stole from Virgil, Swinburne stole from Baudelaire and Crashaw, Browning stole from Donne; as for Wagner, having stolen a motet from Vittorio which he used, almost note for note in _Parsifal_, also from Palestrina and his school, and from Berlioz and from Liszt, it is impossible to say what he did not steal. Oscar Wilde stripped, as far as he could, all the fruit he could gather from the orchards of half a dozen French novelists; besides those of Poe and of Pater. Gabrielle d'Annunzio has stolen as thoroughly as Wilde; in fact, the whole contents of certain short stories. As for George Moore, he has been guilty of as many thefts as these; only he has concealed his thefts with more stealth. Henry James said to some one of my acquaintance: "Moore has an absolute genius for picking other men's brains." That saying is as final as it is fundamental. Rossetti said: "There ought to be always, double of oneself, the self-critic, who should be one always with the poet." The legend of the Doppelgänger haunted him; the result of which is _How They Met Themselves_, where two lovers wandering in a wood come on their doubles, apparitions who, casting their perilous eyes on them sidewise, vanish. It is mysterious and menacing. Pater uses the same symbol: three knights as they hear the night-hawk, are confronted by their own images, but with blood, all three of them, fresh upon the brow, or in the mouth. "It were well to draw the sword, be one's enemy carnal or spiritual; even devils, as all men know, taking flight at its white glitter through the air. Out flashed the brave youths' swords, still with mimic counter-motion, upon nothing--upon the empty darkness before them." These revenants are ghost-like and flame-like: they are the symbols of good and evil; the symbols of the haunting of one uneasy conscience. Balzac, Blake, Hawthorne, saw them in visions; the moderns, such as Maupassant and Moore, must always ignore them.