Ambrose of Milan — as excerpted in the Catena Aurea on Luke 1:8-10

“This then is that High Priest who is still sought by lot, for as yet the true High Priest is unknown; for he who is chosen by lot is not obtained by man’s judgment. That High Priest therefore was sought for, and another typified, the true High Priest for ever, who not by the blood of victims, but by His own blood, was to reconcile God the Father to mankind. Then indeed there were changes in the Priesthood, now it is unchangeable.”