Catena Aurea on Luke 10:29–37: Augustine of Hippo

Or by the Priest and the Levite, two times are represented, namely, of the Law and the Prophets. By the Priest the Law is signified, by which the priesthood and sacrifices were appointed; by the Levites the prophecies of the Prophets, in whose times the law of mankind could not heal, because by the Law came the knowledge not the doing away of sin.