The Encyclopædia under Diderot followed no one philosophic path. Indeed, there are no signs that he ever gave any consideration to either the intellectual or the ethical force of consistency. His writing indicates his utter carelessness both as to the direction and as to the pace of his thought. He had an abiding conviction that Christianity was partly delusion and largely priestcraft, and was maintained chiefly for upholding iniquitous privilege. His antagonism was developed primarily from his emotions and sympathies rather than from his intellect; hence it sometimes swerved, drawing perilously near to formal orthodoxy. Moreover, this vivacious philosopher sometimes rambled into practical advice, and easily effervesced into fervid moralizings of the sentimental and almost tearful sort. His immense natural capacity for sentiment appears in his own account of his meeting with Grimm after a few months' absence. His sentimentalism, however, had its remarkable counterpoise in a most practical tendency of mind. In the Encyclopædia the interests of agriculture and of all branches of manufacture were treated with great fullness; and the reform of feudal abuses lingering in the laws of France was vigorously urged in a style more practical than cyclopædic.
Diderot gave much attention to the drama, and his 'Paradoxe sur le Comédien' (Paradox on the Actor) is a valuable discussion. He is the father of the modern domestic drama. His influence upon the dramatic literature of Germany was direct and immediate; it appeared in the plays of Lessing and Schiller, and much of Lessing's criticism was inspired by Diderot. His 'Père de Famille' (Family-Father) and 'Le Fils Naturel' (The Natural Son) marked the beginning of a new era in the history of the stage, in the midst of which we are now living. Breaking with the old traditions, Diderot abandoned the lofty themes of classic tragedy and portrayed the life of the bourgeoisie. The influence of England, frequently manifest in the work of the Encyclopædists, is evident also here. Richardson was then the chief force in fiction, and the sentimental element so characteristic in him reappears in the dramas of Diderot.
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'
Be the weather fair or foul, it is my custom in any case at five o'clock in the afternoon to stroll in the Palais Royal. I am always to be seen alone and meditative, on the bench D'Argenson. I hold converse with myself on politics or love, on taste or philosophy, and yield up my soul entirely to its own frivolity. It may follow the first idea that presents itself, be the idea wise or foolish. In the Allée de Foi one sees our young rakes following upon the heels of some courtesan who passes on with shameless mien, laughing face, animated glance, and a pug nose; but they soon leave her to follow another, teasing them all, joining none of them. My thoughts are my courtesans.
When it is really too cold or rainy, I take refuge in the Café de la Régence and amuse myself by watching the chess-players. Paris is the place of the world and the Café de la Régence the place of Paris where the best chess is played. There one witnesses the most carefully calculated moves; there one hears the most vulgar conversation; for since it is possible to be at once a man of intellect and a great chess-player, like Légal, so also one may be at once a great chess-player and a very silly person, like Foubert or Mayot.