St. Ambrose: Guardian Angels

“The angels must be entreated for us, who have been given us to guard.”
(Concerning Widows, 55.)

“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.” (Sermo contra Auxent. 11)

~St. Ambrose: (c. 340 – 397), Bishop of Milan.

Virgin Enthroned with Angels, by Cimabue.
Panel, 1290-95; Musée du Louvre, Paris.