Diderot saw its possibilities at once. In another second, as it were, he saw all he could himself do, and all he could not do. He could write about most things. He could study the trades and industries of France, if it took him thirty years of labour, of which the mere thought would daunt most men; by giving their history he could glorify for ever those peaceful arts which make a nation truly great and happy. He could write on Gallantry, on Genius, on Libraries, on Anagrams. For his fertile spirit scarcely any subject was too great or too small. Against intolerance he could bring to bear ‘the concentrated energy of a profound conviction.’ Religion itself he could attack in so far as it interfered with men’s liberty; and miracle he must attack, because, in the words of Voltaire, ‘Men will not cease to be persecutors till they have ceased to be absurd.’ If he had, just to appease the authorities, and to give the book a chance of a hearing, to truckle here and there to prejudice and superstition, well, Diderot could lie as heartily and as cheerfully as he did all things.
But the inexact schoolboy of Harcourt College was no mathematician, and knew his limitations. With the freemasonry of genius he saw in a single flashing glance that d’Alembert was the man to share with him the parentage of this wonderful child. He stormed the calm savant in his attic above the glazier’s shop, overwhelmed, prayed, pressed, bewitched him, and with ‘his soul in his eyes and his lips’ woke in d’Alembert’s quiet breast an enthusiasm which was at least some reflex of his own.
For three years the two worked night and day at the preliminaries of their scheme. In 1750 Diderot poured out, with the warmth and glow of a woman in love, the Prospectus and Plan of his work. The overwhelmingness of his enthusiasm had forced a privilege for it from the authorities. Also in 1750 appeared d’Alembert’s Preface, and the first volume was launched on the world.
From this time until 1765 the history of Diderot and of the Encyclopædia is the same thing. For fifteen years he worked at it unremittingly through storm and sunshine. The idea possessed and dominated him. In a garret on the fifth floor in his lodging in the Rue Taranne, wrapped in an old dressing-gown, with wild hair, bare neck, and bent back, the message he must deliver through the Encyclopædia bubbled into his heart and went straight from his heart to his pen.
‘This thing will surely produce a great revolution in the human mind,’ he said of it in passionate exultation: ‘We shall have served humanity.’ For this Diderot, who disbelieved so loudly and truculently in God, believed hopefully in the improvement of human kind, and had for the race so vast and so generous a pity that he sacrificed to it the coarse pleasures his coarse nature loved, his time, his peace, his worldly advancement, his safety, and his friend.
In 1752 a Royal Edict of matchless imbecility suppressed the first two volumes of the book, at the same time begging its promoters to continue to bring out others! Every year a volume appeared until 1757. The success of the thing was prodigious, and with reason, for it said what, so far, men had only dared to think. It gave the history, quite innocently, of the taxes—of gabelle, of taille, of corvée—and they stood ‘damned to everlasting fame;’ it showed the infamous abuses of the game-laws; it manifested the miracles of science. As by a magnet the genius of Diderot had drawn to him, as contributors, all the genius of France; while always at his side, co-editing, restraining his imprudence, yet working as he worked himself, was d’Alembert.
And then, in 1759, came the great suspension. D’Alembert had written his famous article ‘Geneva,’ and that mad emotionalist, Jean Jacques Rousseau, in the most famous treachery in the history of literature, turned on the philosophic party in his Letter to d’Alembert ‘On Plays.’ The authorities of France united with insulted Calvinism and with Rousseau, and declared the Encyclopædia accursed and forbidden. That would have been bad enough; but there was yet one thing worse. Beaten down by storm and insult, d’Alembert fell back from the fray and left Diderot to fight the battle alone.
He started up in a second, raging and cursing, and went out with his life in his hand. Seizing his pen, he slashed, hewed, hacked, with that reckless weapon on every side. Vincennes and the Bastille loomed ominously; he was never sure one day, says his daughter, of being allowed to continue the next; but he went on. The authorities might burn, but they could not destroy; they might prohibit, but they could not daunt a Diderot.
In 1764, despite galleys and bonfires, kings, ministers, and lettres de cachet, the last ten volumes were ready to appear in a single issue and to crown his life’s labour, when fate struck him a last crushing blow. When the manuscript of the articles had been burnt he discovered that the false Le Breton, fearing for his own safety, had cut out all such passages as he thought might endanger it; and had thus mutilated and ruined the ten volumes past recall.
Diderot burst, literally, into tears of rage. Despair and frenzy seized him. Was this to be the end? Not while he had breath in his body! He attacked Le Breton with an unclean fury not often matched, and in 1765 the volumes appeared, as whole as his talent and energy could make them. It was Diderot who said that if he must choose between Racine, bad husband, father, and friend, but sublime poet; and Racine, good husband, father, and friend, but dull ordinary man, he would choose the first. ‘Of the wicked Racine, what remains? Nothing. Of Racine, the man of genius? The work is eternal.’ When one considers his Herculean labours for the Encyclopædia, one is almost tempted to judge him as he judged Racine.