From THE AGE OF REASON, Part 2, section 20, by Thomas Paine:
Revelation then, so far as the term has relation between God and man, can only be applied to something which God reveals of his will to man; but though the power of the Almighty to make such a communication is necessarily admitted, because to that power all things are possible, yet the thing so revealed (if anything ever was revealed, and which, bye the bye, it is impossible to prove), is revelation to the person only to whom it is made. His account of it to another person is not revelation; and whoever puts faith in that account, puts it in the man from whom the account comes; and that man may have been deceived, or may have dreamed it, or he may be an impostor and may lie. There is no possible criterion whereby to judge of the truth of what he tells, for even the morality of it would be no proof of revelation. In all such cases the proper answer would be, "When it is revealed to me, I will believe it to be a revelation; but it is not, and cannot be incumbent upon me to believe it to be revelation before; neither is it proper that I should take the word of a man as the word of God, and put man in the place of God." This is the manner in which I have spoken of revelation in the former part of the Age of Reason; and which, while it reverentially admits revelation as a possible thing, because, as before said, to the Almighty all things are possible, it prevents the imposition of one man upon another, and precludes the wicked use of pretended revelation.
But though, speaking for myself, I thus admit the possibility of revelation, I totally disbelieve that the Almighty ever did communicate anything to man, by any mode of speech, in any language, or by any kind of vision, or appearance, or by any means which our senses are capable of receiving, otherwise than by the universal display of himself in the works of the creation, and by that repugnance we feel in ourselves to bad actions, and the disposition to do good ones.
The most detestable wickedness, the most horrid cruelties, and the greatest miseries that have afflicted the human race have had their origin in this thing called revelation, or revealed religion. It has been the most dishonorable belief against the character of the Divinity, the most destructive to morality and the peace and happiness of man, that ever was propagated since man began to exist. It is better, far better, that we admitted, if it were possible, a thousand devils to roam at large, and to preach publicly the doctrine of devils, if there were any such, than that we permitted one such impostor and monster as Moses, Joshua, Samuel, and the Bible prophets, to come with the pretended word of God in his mouth, and have credit among us.
(End of quote by Paine.)