Picture then the High Priest Christ leaving the sacristy of heaven for the altar of Calvary. He has already put in the vestment of our human nature, the maniple of our suffering, the stole of priesthood, the chasuble of the Cross. Calvary is his cathedral; the rock of Calvary is the altar stone; the sun turning to red is the sanctuary lamp; Mary and John are the living side altars; the Host is His Body; the wine His Blood. He is upright as Priest, yet He is prostrate as Victim. His Mass is about to begin.
— Bishop Fulton Sheen, Calvary and the Mass