At first, every one of you, thinking he possessed it, demanded of the others an implicit faith; but perceiving the contrariety of your opinions, you found it necessary to submit them to a common rule of evidence, and to bring them to one general term of comparison; and you agreed that each should exhibit the proofs of his doctrine.

You began by alleging facts; but each religion and every sect, being equally furnished with miracles and martyrs, each producing an equal number of witnesses, and offering to support them by a voluntary death, the balance on this first point, by right of parity, remained equal.
"You then passed to the trial of reasoning; but the same arguments applying equally to contrary positions--the same assertions, equally gratuitous, being advanced and repelled with equal force, and all having an equal right to refuse his assent, nothing was demonstrated.

What is more, the confrontation of your systems has brought up more and extraordinary difficulties; for amid the apparent or adventitious diversities, you have discovered a fundamental resemblance, a common groundwork; and each of you pretending to be the inventor, and first depositary, have taxed each other with adulterations and plagiarisms; and thence arises a difficult question concerning the transmission of religious ideas from people to people.
"Finally, to complete your embarrassment: when you endeavored to explain your doctrines to each other, they appeared confused and foreign, even to their adherents; they were founded on ideas inaccessible to your senses; you consequently had no means of judging of them, and you confessed yourselves in this respect to be only the echoes of your fathers.

Hence follows this other question: how came they to the knowledge of your fathers, who themselves had no other means than you to conceive them?
So that, on the one hand, the succession of these ideas being unknown, and on the other, their origin and existence being a mystery, all the edifice of your religious opinions becomes a complicated problem of metaphysics and history.
"Since, however, these opinions, extraordinary as they may be, must have had some origin; since even the most abstract and fantastical ideas have some physical model, it may be useful to recur to this origin, and discover this model--in a word, to find out from what source the human understanding has drawn these ideas, at present so obscure, of God, of the soul, of all immaterial beings, which make the basis of so many systems; to unfold the filiation which they have followed, and the alterations which they have undergone in their transmissions and ramifications.

If, then, there are any persons present who have made a study of these objects, let them come forward, and endeavor, in the face of nations, to dissipate the obscurity in which their opinions have so long remained.".