If man, therefore, had the courage to throw aside his prejudices, which every thing conspires to render as durable as himself--if divested of fear he would examine coolly--if guided by reason he would dispassionately view the nature of things, the evidence adduced in support of any given doctrine; he would, at least, be under the necessity to acknowledge, that the idea of the Divinity is not innate--that it is not anterior to his existence--that it is the production of time, acquired by communication with his own species--that, consequently, there was a period when it did not actually exist in him: he would see clearly, that he holds it by tradition from those who reared him: that these themselves received it from their ancestors: that thus tracing it up, it will be found to have been derived in the last resort, from ignorant savages, who were our first fathers. The history of the world will shew that crafty legislators, ambitious tyrants, blood-stained conquerors, have availed themselves of the ignorance, the fears, the credulity of his progenitors, to turn to their own profit an idea to which they rarely attached any other substantive meaning than that of submitting them to the yoke of their own domination.

Without doubt there have been mortals who have dreamed they have seen the Divinity. Mahomet, I believe, boasted he had a long conversation with the Deity, who promulgated to him the system of the Mussulmans. But are there not thousands, even of the theologians, who will exhaust their breath, and fatigue their lungs with vociferating this man was a liar; whose object was to take advantage of the simplicity, to profit by the enthusiasm, to impose on the credulity of the Arabs; who promulgated for truths, the crazy reveries of his own distempered imagination? Nevertheless, is it not a truth, that this doctrine of the crafty Arab, is at this day the creed of millions, transmitted to them by their ancestors, rendered sacred by time, read to them in their mosques, adorned with all the ceremonies of superstitious worship; of which the inhabitants of a vast portion of the earth do not permit themselves for an instant to doubt the veracity; who, on the contrary, hold those who do not accredit it as dogs, as infidels, as beings of an inferior rank, of meaner capacities than themselves? Indeed that man, even if he were a theologian, would not experience the most gentle treatment from the infuriated Mahometan, who should to his face venture to dispute the divine mission of his prophet. Thus the ancestors of the Turk have transmitted to their posterity, those ideas of the Divinity which they manifestly received from those who deceived them; whose impositions, modified from age to age, subtilized by the priests, clothed with the reverential awe inspired by fear, have by degrees acquired that solidity, received that corroboration, attained that veteran stability, which is the natural result of public sanction, backed by theological parade.

The System of Nature, Volume 2 — Part 58