Theophylact of Ohrid
Catena Aurea · Lukasevangelium 2
—and blessed God, and said, Lord, now lettest thou thy servant depart in peace, according to thy word: For mine eyes have seen thy salvation, Which thou hast prepared before the face of all people; A light to lighten the Gentiles, and the glory of thy people Israel.
By these words, Before the face, he signifies that our Lord’s incarnation would be visible to all men. And this salvation he says is to be the light of the Gentiles and the glory of Israel, as it follows, A light to lighten the Gentiles.