St. Ambrose perhaps meant that John Baptist had, for a space, lost the prophetic Light, when he doubted, and sent disciples to enquire of Jesus. The darkness of the dungeon had drawn a cloud over the prisoner’s soul, and for a time he was in the state described by Isaiah ix. 1, walking in darkness and the shadow of death, the state of the people of Israel (represented by the synagogue) at the time of our Lord’s Advent. See S. Matt. iv. 12–16.