St. Augustine: "The last judgment"

"THAT the last judgment, then, shall be administered by Jesus Christ in the manner predicted in the sacred writings is denied or doubted by no one, unless by those who, through some incredible animosity or blindness, decline to believe these writings, though already their truth is demonstrated to all the world. And at or in connection with that judgment the following events shall come to pass, as we have learned: Elias the Tishbite shall come; the Jews shall believe; Antichrist shall persecute; Christ shall judge; the dead shall rise; the good and the wicked shall be separated; the world shall be burned and renewed. All these things, we believe, shall come to pass; but how, or in what order, human understanding cannot perfectly teach us, but only the experience of the events themselves. My opinion, however, is, that they will happen in the order in which I have related them."

~St. Augustine: The City of God, Book XX, Chap. 30.

Last Judgment, by Jan van Eyck. Oil on wood transferred to canvas.
1420-25; Metropolitan Museum of Art, New York.

St. Ambrose: On guardian angels

“The servants of Christ are protected by invisible, rather than visible, beings. But if these guard you, they do so because they have been summoned by your prayers.”

~St. Ambrose (c. 340 – 397): Sermo contra Auxent., 11.

Linaioli Tabernacle (detail), by Fra Angelico.
Tempera on wood, c. 1433;
Museo di San Marco, Florence.