Glossa Ordinaria
Catena Aurea · Matthäusevangelium 1
But while he thought on these things, behold, the angel of the Lord appeared unto him in a dream, saying, Joseph, thou son of David, fear not to take unto thee Mary thy wife: for that which is conceived in her is of the Holy Ghost.
(ord.) To be born in her, and born of her, are two different things; to be born of her is to come into the world; to be born in her, is the same as to be conceived. Or the word born is used according to the foreknowledge of the Angel which he has of God, to whom the future is as the past.