We hear from St. John Chrysostom and Cyril of Alexandria regarding the son of the promise and the son of the flesh. The older son is sent away, but not without provision, and the younger is the one to inherit the priestly blessing from the Father. Abel the just, Abraham our Father in Faith and the High Priest are invoked in the Roman Canon at the Holy Sacrifice of the Mass, remembering the priestly role and faith necessary to be a son of God.