St. John, in the Apocalypse,[46] saw around the throne of the Most High four animals, which doubtless were four angels; they were covered with eyes before and behind. The first resembled a lion, the second an ox, the third had the form of a man, and the fourth was like an eagle with outspread wings; each of them had six wings, and they never ceased to cry night and day, "Holy, holy, holy, Lord God Almighty, who was, and is, and is to come." The angel who was placed at the entrance of the terrestrial paradise was armed with a shining sword,[47] as well as the one who appeared to Balaam,[48] and who threatened, or was near killing both himself and his ass; and so, apparently, was the one who showed himself to Joshua in the plain of Jericho,[49] and the angel who appeared to David, ready to smite all Israel. The angel Raphael guided the young Tobias to Rages under the human form of a traveler.[50] The angel who was seen by the holy woman at the sepulchre of the Saviour, who overthrew the large stone which closed the mouth of the tomb, and who was seated upon it, had a countenance which shone like lightning, and garments white as snow.[51] In the Acts of the Apostles,[52] the angel who extricated them from prison, and told them to go boldly and preach Jesus Christ in the temple, also appeared to them in a human form. The manner in which he delivered them from the dungeon is quite miraculous; for the chief priests having commanded that they should appear before them, those who were sent found the prison securely closed, the guards wide awake; but having caused the doors to be opened, they found the dungeon empty. How could an angel without opening, or any fracture of the doors, thus extricate men from prison without either the guards or the jailer perceiving anything of the matter? The thing is beyond any known powers of nature; but it is no more impossible than to see our Saviour, after his resurrection, invested with flesh and bones, as he himself says, come forth from his sepulchre, without opening it, and without breaking the seals,[53] enter the chamber wherein were the apostles without opening the doors,[54] and speak to the disciples going to Emmaus without making himself known to them; then, after having opened their eyes, disappear and become invisible.[55] During the forty days that he remained upon earth till his ascension, he drank and ate with them, he spoke to them, he appeared to them; but he showed himself only to those witnesses who were pre-ordained by the eternal Father to bear testimony to his resurrection. The angel who appeared to the centurion Cornelius, a pagan, but fearing God, answered his questions, and discovered to him unknown things, which things came to pass.