The books of the New Testament are the same manner full of facts which prove the apparition of good angels. The angel Gabriel appeared to Zachariah the father of John the Baptist, and predicted to him the future birth of the Forerunner. The Jews, who saw Zachariah come out of the temple, after having remained within it a longer time than usual, having remarked that he was struck dumb, had no doubt but that he had seen some apparition of an angel. The same Gabriel announced to Mary the future birth of the Messiah.
When Jesus was born in Bethlehem, the angel of the Lord appeared to the shepherds in the night, and declared to them that the Saviour of the world was born at Bethlehem. There is every reason to believe that the star which appeared to the Magi in the East, and which led them straight to Jerusalem, and thence to Bethlehem, was directed by a good angel. St. Joseph was warned by a celestial spirit to retire into Egypt, with the mother and the infant Christ, for fear that Jesus should fall into the hands of Herod, and be involved in the massacre of the Innocents. The same angel informed Joseph of the death of King Herod, and told him to return to the land of Israel.
After the temptation of Jesus Christ in the wilderness, angels came and brought him food. The demon tempter said to Jesus Christ that God had commanded his angels to lead him, and to prevent him from stumbling against a stone; which is take from the 92d Psalm, and proves the belief of the Jews on the article of guardian angels. The Savior confirms the same truth when he says that the angels of children constantly behold the face of the celestial Father. At the last judgement, the good angels will separate the just, and lead them to the kingdom of heaven, while they will precipitate the wicked into eternal fire.
At the agony of Jesus Christ in the garden of Olives, an angel descended from heaven to console him. After his resurrection, angels appeared to the holy women who had come to his tomb to embalm him. In the Acts of the Apostles, they appeared to the apostles as soon as Jesus had ascended into heaven and the angel of the Lord came and opened the doors of the prison where the apostles were confined, and set them at liberty. In the same book, St. Stephen tells us that the law was given to Moses by the ministration of angels; consequently, those were angels who appeared on Sinai and Horeb, and who spoke to him in the same of God, as his ambassadors, and as invested with his authority; also, the same Moses, speaking of the angel of the Lord, who was to introduce Israel into the Promised Land, says that "the name of God is in him." St. Peter, being in prison, is delivered from thence by an angel, who conducted him the length of a street, and disappeared. St. Peter, knocking at the door of the house in which his brethren were, they could not believe that it was he; they thought that it was his angel who knocked and spoke. St. Paul, instructed in the school of the Pharisees, thought as they did on the subject of angels; he believed in their existence, in opposition to the Sadducees, and supposed that they could appear. When this apostle, having been arrested by the Romans, related to the people how he had been overthrown at Damascus, the Pharisees, who were present, replied to those who exclaimed against him -- "How do we know, if an angel or a spirit hath not spoken to him?" St. Luke says that a Macedonia (apparently the angel of Macedonia) appeared to St. Paul, and begged him to come and announce the Gospel in that country.
St. John, in the Apocalypse, speaks of the seven angels who presided over the churches in Asia. I know that these seven angels are the bishops of these churches, but the ecclesiastical tradition will have it that every church has its tutelary angel. In the same book, the Apocalypse, are related divers appearances of angels. All Christian antiquity has recognized them; the synagogue also has recognized them; so that it may be affirmed that nothing is more certain than the existence of good angels and their apparitions.
I place in the number of apparitions, not only those of good or bad angels, and the spirits of the dead who show themselves to the living, but also those of the living who show themselves to the angels or souls of the dead; whether these apparitions are seen in dreams, or during sleep, or awaking; whether they manifest themselves to all those who are present, or only to the persons to whom God judges proper to manifest them. For instance, in the Apocalypse, St. John saw the four animals, and the four-and-twenty elders, who were clothed in white garments and wore crowns of gold upon their heads, and were seated on thrones around that of the Almighty, who prostrated themselves before the throne of the Eternal, and cast their crowns at his feet.
And, elsewhere: "I saw four angels standing at the four corners of the world, who held back the four winds and prevented them from blowing on the earth; then I saw another angel, who rose on the side of the east, and who cried out to the four angels who had orders to hurt the earth, Do no harm to the earth, or the sea, or the trees, until we have impressed a sign on the foreheads of the servants of God. And I heard that the number of those who received this sign (or mark) was a hundred and forty-four thousand. Afterwards I saw an innumerable multitude of all nations, tribes, people, and languages, standing before the throne of the Most High, arrayed in white garments, and having palms in their hands."
And in the same book St. John says, after having described the majesty of the throne of God, and the adoration paid to him by the angels and saints prostrate before him, one of the elders said to him, -- "Those whom you see covered with white robes, are those who have suffered great trials and afflictions, and have washed their robes in the blood of the Lamb; for which reason they stand before the throne of God, and will do so night and day in his temple; and He who is seated on the throne will reign over them, and the angel which is in the midst of the throne will conduct them to the fountains of living water." And, again, "I saw under the altar of God the souls of those who have been put to death for defending the Word of God, and for the testimony which they have rendered; they cried with a loud voice, saying, When, O Lord, wilt thou not avenge our blood upon those who are on the earth?" &c.
All these apparitions, and several others similar to them, which might be related as being derived from the holy books as well as from authentic histories, are true apparitions, although neither the angels nor the martyrs spoken of in the Apocalypse came and presented themselves to St. John; but, on the contrary, this apostle was transported in spirit to heaven, to see there what we have just related. These apparitions which may be called passive on the part of the angels and holy martyrs, and active on the part of the holy apostle who saw them.
This article is from Augustine Calmet's book called The Phantom World: The History and
Philosophy of Spirits, Apparitions, etc, etc.
Good angels of the Old Testament
Good angels in the New Testament
Appearance of good angels
Opinions concerning good angels
Apparitions of good genii
Objections to the reality of magic
Reply to objections to the reality of magic
Examination of the affair of Hocque, magician
Magic of the Egyptians and Chaldeans
Magic among the Greeks and Romans
Examples which prove the reality of magic