The priests have had the art to unite their religious system with some moral tenets which are really good. This renders their mysteries more sacred, and lends authority to their ambiguous dogmas. By the aid of this artifice, they have given currency to the opinion that without religion there can be neither morality nor virtue. I hope, Madam, in my next letter, to complete the exposure of this prejudice, and to demonstrate, to whoever will reflect, how uncertain, abstract, and deceitful are the notions which religion has inspired. I shall clearly show, that they have often infected philosophers themselves; that up to the present time, they have retarded the progress of morality; and that they have transformed a science the most certain, plain, and sensible to every thinking man, into a system at once doubtful and enigmatical, and full of difficulties. I am, Madam, &c.
By this time, Madam, you will have reflected on what I had the honor to address to you, and perceived how impossible it is to found a certain and invariable morality on a religion enthusiastic, ambiguous, mysterious, and contradictory, and which never agreed with itself. You know that the God who appears to have taken pleasure in rendering himself unintelligible, that the God who is partial and changeable, that the God whose precepts are at variance one with another, can never serve as the base on which to rear a morality that shall become practicable among the inhabitants of the earth. In short, how can we found justice and goodness on attributes that are unjust and evil; yet attributes of a Being who tempts man, whom he created, for the purpose of punishing him when tempted? How can we know when we do the will of a God who has said, _Thou shalt not kill_, and who yet allows his people to exterminate whole nations? What idea can we form of the morality of that God who declares himself pleased with the sanguinary conduct of Moses, of the rebel, the assassin, the adulterer, David? Is it possible to found the holy duties of humanity on a God whose favorites have been inhuman persecutors and cruel monsters? How can we deduce our duties from the lessons of the priests of a God of peace, who, nevertheless, breathes only sedition, vengeance, and carnage? How can we take as models for our conduct _saints_, who were useless enthusiasts, or turbulent fanatics, or seditious apostates; who, under the pretext of defending the cause of God, have stirred up the greatest ravages on the earth? What wholesome morality can we reap from the adoption of impracticable virtues, from their being supernatural, which are visibly useless to ourselves, to those among whom we live, and in their consequences often dangerous? How can we take as guides in our conduct priests, whose lessons are a tissue of unintelligible opinions, (_for all religion is but opinion_,) puerile and frivolous practices, which these gentlemen prefer to real virtues? In fine, how can we be taught _the truth_, conducted in an unerring path, by men of a changeable morality, calculated upon and actuated by their present interests, and who, although they pretend to preach good-will to men, humanity, and peace, have, as their text-book, a volume stained with the records of injustice, inhumanity, sedition, and perfidy?
