Voltaire seems to have been at bottom agnostic holding on to the narrow ledge of theism and afraid to drop. He says: “For myself, I am sure of nothing. I believe that there is an intelligence, a creative power, a God. I express an opinion to-day; I doubt of it to-morrow; the day after I repudiate it. All honest philosophers have confessed to me, when they were warmed with wine, that the great Being has not given to them one particle more evidence than to me.” He believed in the immortality of the soul, yet expresses himself dubiously, saying to Madame du Deffand that he knew a man who believed that when a bee died it ceased to hum. That man was himself. On the appearance, however, in 1770 of the Baron d’Holbach’s _System of Nature_—in which he was very considerably helped by Diderot—Voltaire took alarm at its openly pronounced atheism. “The book,” he wrote, “has made all the philosophers execrable in the eyes of the King and his court. Through this fatal work philosophy is lost for ever in the eyes of all magistrates and fathers of families.” He accordingly took in hand to combat its atheism, which he does in the article _Dieu_ in the _Philosophical Dictionary_, and in his _History of Jenni_ (Johnny), a lad supposed to be led on a course of vice by atheism and reclaimed to virtue by the design argument. Voltaire’s real attitude seems fairly expressed in his celebrated mot: “S’il n’y avait pas un dieu, il fraudrait l’inventer”—“If there was not a God it would be necessary to invent one,” which, Morin remarks, was exactly what had been done. Morley says: “It was not the truth of the theistic belief in itself that Voltaire prized, but its supposed utility as an assistant to the police.” THE ENCYCLOPÆDIA Voltaire was a great stimulator of the French _Encyclopædia_, a work designed to convey to the many the information of the few. Here again the inspiration was English. It was the success of the _Cyclopcedia of Arts and Sciences_, edited by the Freethinker Ephraim Chambers, in 1728, which suggested the yet more famous work carried out by Diderot and D’Alembert, with the assistance of such men as Helvetius, Buffon, Turgot, and Condorcet. Voltaire took an ardent interest in the work, and contributed many important articles. The leading contributors were all Freethinkers, but they were under the necessity of advancing their ideas in a tentative way on account of the vigilant censorship. Voltaire not only wrote for the _Encyclopædia_, but gave valuable hints and suggestions to Diderot and D’Alembert, as well as much sound advice. He cautioned them, for instance, against patriotic bias. “Why,” he asks D’Alembert, “do you say that the sciences are more indebted to France than to any other nation? Is it to the French that we are indebted for the quadrant, the fire-engine, the theory of light, inoculation, the seed-sower? _Parbleu!_ you are jesting! We have invented only the wheelbarrow.”