861. Consequently, since the human understanding is so full of fallacies arising from the bodily senses that it is formed by nothing else but fallacies, and into nothing but fallacies, so that there is only darkness in it, therefore it is amazing if anyone of sound mind, wanting to think aright, would decide or maintain that he would by no means believe matters of faith, or of light, or of heaven, or even more, which are Divine, unless he understood them.