"In the name of Nature the enlightened Holbach calls for the defense of one’s country not only against external enemies but against internal tyrants. But what does he mean by “Nature"? There is nothing outside her; she is one and all at once. Man shall discover her laws, admire her inexhaustible energy, use his discoveries for his own happiness, and resign himself to his ignorance of her last, her ultimate causes which are impenetrable. With his whole being man belongs to her. The abstract entity which, according to such materialists, forms the basis of right conduct is as indeterminate as the Deus absconditus of the Protestants, and the promise of happiness in this world is as problematical as bliss in the next, which is extremely uncertain. The naturalistic doctrine agrees with the theological doctrine it opposes in identifying what is most permanent and powerful with what is most exalted and worthy of love — as if this were a matter of course."