We have supposed that apparitions were the work of angels, demons, or souls of the defunct; we do not talk of the appearance of God himself; his will, his operations, his power, are above our reach; we acknowledge that he can do all that he wills to do, that his will is all-powerful, and that he places himself, when he chooses, above the laws which he has made. As to the apparitions of the living to others also living, they are of a different nature from what we propose to examine in this place; we shall not fail to speak of them hereafter. Whatever system we may follow on the nature of angels, or demons, or souls separated from the body; whether we consider them as purely spiritual substances, as the Christian church at this day holds; whether we give them an aerial body, subtile, and invisible, as many have taught; it appears almost as difficult to render palpable, perceptible, and thick a subtile and aerial body, as it is to condense the air, and make it seem like a solid and perceptible body; as, when the angels appeared to Abraham and Lot, the angel Raphael to Tobias, whom he conducted into Mesopotamia; or when the demon appeared to Jesus Christ, and led him to a high mountain, and on the pinnacle of the Temple at Jerusalem; or when Moses appeared with Elias on Mount Tabor: for those apparitions are certain from Scripture. If you will say that these apparitions were seen only in the imagination and mind of those who saw, or believed they saw angels, demons, or souls separated from the body, as it happens every day in our sleep, and sometimes when awake, if we are strongly occupied with certain objects, or struck with certain things which we desire ardently or fear exceedingly--as when Ajax, thinking he saw Ulysses and Agamemnon, or Menelaues, threw himself upon some animals, which he killed, thinking he was killing those two men his enemies, and whom he was dying with the desire to wreak his vengeance upon--on this supposition, the apparition will not be less difficult to explain. There was neither prepossession nor disturbed imagination, nor any preceding emotion, which led Abraham to figure to himself that he saw three persons, to whom he gave hospitality, to whom he spoke, who promised him the birth of a son, of which he was scarcely thinking at that time. The three apostles who saw Moses conversing with Jesus Christ on Mount Tabor were not prepared for that appearance; there was no emotion of fear, love, revenge, ambition, or any other passion which struck their imagination, to dispose them to see Moses; as neither was there in Abraham, when he perceived the three angels who appeared to him.