Indeed, if men condescended to examine things coolly, they would find that on this earth the name of God is but too frequently made use of as a motive to indulge the worst of human passions. Ambition, imposture, and tyranny, have often formed a league to avail themselves of its influence, to the end that they might blind the people, and bend them beneath a galling yoke: the monarch sometimes employs it to give a divine lustre to his person--the sanction of heaven to his rights--the confidence of its votaries to his most unjust, most extravagant whims. The priest frequently uses it to give currency to his pretensions, to the end that he may with impunity gratify his avarice, minister to his pride, secure his independence. The vindictive, enraged, superstitious being, introduces the cause of his gods, that he may give free scope to his fury, which he qualifies with zeal. In short, superstition becomes dangerous, because it justifies those passions, lends legitimacy to those crimes, holds forth as commendable those excesses, of which it does not fail to gather the fruit: according to its ministers, every thing is permitted to revenge the most high: thus the name of the Divinity is made use of to authorize the most baneful actions, to palliate the most injurious transgressions. The atheist, as he is called, when he commits crimes, cannot, at least, pretend that it is his gods who command them, or who clothe them with the mantle of their approval, this is the excuse the superstitious being offers for his perversity; the tyrant for his persecutions; the priest for his cruelty, and for his sedition; the fanatic for the ebullition of his boiling passions; the penitent for his inutility.

"They are not," says Bayle, "the general opinions of the mind, but the passions, which determine us to act." Atheism, as it is called, is a system which will not make a good man wicked but it may, perhaps, make a wicked man good. "Those," says the same author, "who embraced the sect of Epicurus, did not become debaucheés because they had adopted the doctrine of Epicurus; they only lent themselves to the system, then badly understood, because they were debaucheés." In the same manner, a perverse man may embrace atheism, because he will flatter himself, that this system will give full scope to his passions: he will nevertheless be deceived. Atheism, as it is called, if well understood, is founded upon nature and upon reason, which never can, like superstition, either justify or expiate the crimes of the profligate.

The System of Nature, Volume 2 — Part 194