If France had been prosperous, all this would have passed for the empty declamation of an excited man of letters. As it was, such declamation only described, in language as accurate as it was violent and stinging, the real position of the country. In the urgency of a present material distress, men were not over-careful that the basis of the indictment should be laid in the principles of a sound historical philosophy of society. We can hardly wonder at it. What is interesting, and what we do not notice earlier in the century, is that in the System of Nature the revolt against the impotence of society, and the revolt against the omnipotence of God, made a firm coalition. That coalition came to a bloody end for the time, four-and-twenty years after Holbach’s book proclaimed it, when the Committee of Public Safety despatched Hébert, and better men than Hébert, to the guillotine for being atheists. Atheism, as Robespierre assured them, was aristocratic.
Holbach’s work may be said to spring from the doctrine that the social deliverance of man depends on his intellectual deliverance, and that the key to his intellectual deliverance is only to be found in the substitution of Naturalism for Theism. What he means by Naturalism we shall proceed shortly to explain. The style, we may remark, notwithstanding the energy and coherence of the thought, is often diffuse and declamatory. Some one said of the System of Nature, that it contained at least four times too many words. Yet Voltaire, while professing extreme dislike of its doctrine, admitted that the writer had somehow caught the ear of the learned, of the ignorant, and of women. “He is often clear,” said Voltaire, “and sometimes eloquent, yet he may justly be reproached with declamation, with repeating himself, and with contradicting himself, like all the rest of them.”[150] Galiani made an over-subtle criticism on it, when he complained of the want of coolness and self-possession in the style, and then said that it looked as if the writer were pressed less to persuade other people than to persuade himself. This was a crude impression. Nobody can have any doubt of the writer’s profound sincerity, or of his earnest desire to make proselytes. He knows his own mind, and hammers his doctrines out with a hard and iterative stroke that hits its mark. Yet his literary tone, in spite of its declamatory pitch, not seldom sinks into a drone. Holbach’s contemporaries were in too fierce contact with the tusks and hooked claws of the Church, to have any mind for the rhythm of a champion’s sentences or the turn of his periods. But now that the efforts of the heterodox have taught the Churches to be better Christians than they were a hundred years ago, we can afford to admit that Holbach is hardly more captivating in style, and not always more edifying in temper, than some of the Christian Fathers themselves.
What then is the system of Nature, and what is that Naturalism which is to replace the current faith in the deities outside of observable nature? The writer makes no pretence of feeling a tentative way towards an answer. From the very outset his spirit is that of dogmatic confidence. He is less a seeker than an expounder; less a philosopher than a preacher; and he boldly dismisses proof in favour of exhortation.
“Let man cease to search outside the world in which he dwells for beings who may procure him a happiness that nature refuses to grant; let him study that nature, let him learn her laws, and contemplate the energy and the unchanging fixity with which she acts; let him apply his discoveries to his own felicity, and submit in silence to laws from which nothing can withdraw him; let him consent to ignore the causes, surrounded as they are for him by an impenetrable veil; let him undergo without a murmur the decrees of universal force.”
Science derived from experience is the source of all wise action. It is physical science (la physique), and experience, that man ought to consult in religion, morals, legislature, as well as in knowledge and the arts. It is by our senses that we are bound to universal nature; it is by our senses that we discover her secrets. The moment that we first experience them we fall into a void where our imagination leads us endlessly astray.
Movement is what establishes relations between our organs and external objects. Every object has laws of movement that are peculiar to itself. Everything in the universe is in movement; no part of nature is really at rest.[151]
Whence does nature receive this movement? From herself, since she is the great whole, outside of which consequently nothing can exist. Motion is a fashion of being which flows necessarily from the essence of matter; matter moves by its own energy; its motion is due to forces inherent in it; the variety of its movements, and of the phenomena resulting from them, comes from variation of the properties, the qualities, the combinations, originally found in the different primitive matters of which nature is the assemblage.
Whence came matter? Matter has existed from all eternity, and a motion is one of the inherent and constitutive qualities of matter; motion also has existed from eternity.
The abstract idea of matter must be decomposed. Instead of regarding matter as a unique existence, rude, passive, incapable of moving itself, of combining itself, we ought to look upon it as a Kind of existence, of which the various individual members comprising the Kind, in spite of their having some common properties, such as extension, divisibility, figure, etc., still ought not to be ranged in a single class, nor comprised in a single denomination.
What is nature’s process? Continual movement. From the stone which is formed in the bowels of the earth by the intimate combination, as they approach one another, of analogous and similar molecules, up to the sun, that vast reservoir of heated particles that gives light to the firmament; from the numb oyster up to man—we observe an uninterrupted progression, a perpetual chain of combination and movements, from which there result beings that only differ among one another by the variety of their elementary matters, and of the combination and proportion of these elements. From this variety springs an infinite diversity of ways of existing and acting. In generation, nutrition, preservation, we can see nothing but different sorts of matter differently combined, each of them endowed with its own movements, each of them regulated by fixed laws that cause them to undergo the necessary changes.