It is incalculable what evil such a person as he may do, if so disposed. There is a sublimity in his ideas, with which there is to me a mixture of terror; and, when he talks of religion, he does it as one that rather dreads its truths than reverences them. He, indeed, pretends great strictness of orthodoxy regarding some of the points of doctrine embraced by the reformed church; but you do not seem to perceive that both you and he are carrying these points to a dangerous extremity. Religion is a sublime and glorious thing, the bonds of society on earth, and the connector of humanity with the Divine nature; but there is nothing so dangerous to man as the wresting of any of its principles, or forcing them beyond their due bounds: this is of all others the readiest way to destruction. Neither is there anything so easily done. There is not an error into which a man can fall which he may not press Scripture into his service as proof of the probity of, and though your boasted theologian shunned the full discussion of the subject before me, while you pressed it, I can easily see that both you and he are carrying your ideas of absolute predestination, and its concomitant appendages, to an extent that overthrows all religion and revelation together; or, at least, jumbles them into a chaos, out of which human capacity can never select what is good. Believe me, Mr. Robert, the less you associate with that illustrious stranger the better, for it appears to me that your creed and his carries damnation on the very front of it.
James Hogg, The Private Memoirs and Confessions of a Justified Sinner (1824)
By the way, shortly after the above, Robert and his companion murder Mr. Blanchard.