Israel was the priestly people. God revealed this in the Covenant at Sinai. However, with the sacrifice that Jesus offered at Calvary, the priesthood of the Old Testament came to an end. Through Baptism we are also made to share in the priesthood of the eternal priest, Jesus. From the children of the church who have received common priesthood God specially chooses some persons and raises them to the ministerial priesthood. They are the priests of the New Testament. They perform the holy sacrifice of Mass and other sacraments. The students should get this message from this lesson.