To Damianus, Bishop of Sidon.
Ecclesiastical History, Dialogues, and Letters · Blessed Theodoret of Cyrus
It is the nature of mirrors to reflect the faces of them that gaze into them, and so whoever looks at them sees his own form. This is the same too with the pupils of the eyes, for they shew in them the likeness of other people’s features. Of this your holiness furnishes an instance, for you have not seen my ugliness, but have beheld with admiration your own beauty. I really have none of the qualities which you have mentioned. It is nevertheless my prayer that your words may be vindicated by actual fact, and I beseech your piety by your prayers to cause it to come to pass that your praises may not fall to the ground through having no reality to correspond with them.
Theo 7.49.2