 Sometimes together with his pectoral cross, the bishop also wears a small, circular icon of the Saviour or the Mother of God, called the panagia (All-Holy, after the Mother of Christ), or engolpion, over his heart.This is to remind the bishop that he must carry Christ and his Holy Mother in his heart, and thus his heart must be pure.An episcopal staff called a crosier is carried by the bishop, as a shepherd's crook, to be reminiscent that he is a shepherd of Christ's flock.