Since the earliest days of the Church, theologians have struggled to understand how humanity and divinity coexisted in the person of Christ. Proponents of the Arian heresy, which held that Jesus could not have been fully divine, found significant scriptural evidence of their position: Jesus wondered, questioned, feared, suffered, and prayed. The defenders of orthodoxy, such as Hilary of Poitiers, Ambrose of Milan, Jerome, and Augustine, showed considerable...