Goethe was strongly attracted by the genius of Diderot, and thought it worth his while not only to translate but to supply with a long and luminous commentary the latter's 'Essay on Painting.' It was by a singular trick of fortune, too, that one of Diderot's most powerful works should first have appeared in German garb, and not in the original French until after the author's death. A manuscript copy of the book chanced to fall into the hands of Goethe, who so greatly admired it that he at once translated, annotated, and published it. This was the famous dialogue 'Le Neveu de Rameau' (Rameau's Nephew), a work which only Diderot's peculiar genius could have produced. Depicting the typical parasite, shameless, quick-witted for every species of villainy, at home in every possible meanness, the dialogue is a probably unequaled compound of satire, high æsthetics, gleaming humor, sentimental moralizing, fine musical criticism, and scientific character analysis, with passages of brutal indecency. Among literary critics of painting, Diderot has his place in the highest rank. His nine 'Salons'--criticisms which in his good-nature he wrote for the use of his friend Grimm, on the annual exhibitions in the Paris Salon from 1759 onward--have never been surpassed among non-technical criticisms for brilliancy, freshness, and philosophic suggestiveness. They reveal the man's elemental strength; which was not in his knowledge, for he was without technical training in art and had seen scarcely any of the world's masterpieces, but in his sensuously sympathetic nature, which gave him quickness of insight and delicacy in interpretation. He had the faculty of making and keeping friends, being unaffected, genial, amiable, enthusiastically generous and helpful to his friends, and without vindictiveness to his foes. He needed these qualities to counteract his almost utter lack of conscientiousness, his gush of sentiment, his unregulated morals, his undisciplined genius, his unbalanced thought. His style of writing, often vivid and strong, is as often awkward and dull, and is frequently lacking in finish. As a philosophic author and thinker his voluminous work is of little enduring worth, for though plentiful in original power it totally lacks organic unity; his thought rambles carelessly, his method is confused. It has been said of him that he was a master who produced no masterpiece. But as a talker, a converser, all witnesses testify that he was wondrously inspiring and suggestive, speaking sometimes as from mysterious heights of vision or out of unsearchable deeps of thought. FROM 'RAMEAU'S NEPHEW'