John Lightfoot on Luke 2:14

[Glory to God in the highest.] We may very well understand this angelic hymn, if good will towards men, be taken for the subject, and the rest of the words for the predicate. The good will of God towards men is glory to God in the highest, and peace on earth. And, is put between glory and peace; not between them and good will.

But now this good will of God towards men, being so wonderfully made known in the birth of the Messiah, how highly it conduced to the glory of God, would be needless to shew; and how it introduced peace on the earth the apostle himself shews from the effect, Ephesians 2:14; Colossians 1:20; and several other places.