But the Priesthood which He created, and the offering in which it consisted, sprung from the union of the two acts which formed His own High-Priesthood, the assumption of the manhood for the purpose of redeeming man, and the execution of that purpose by His death on the cross. The Priesthood contained them both in itself, for the Body given was the Body broken on the cross, the Blood given was the Blood shed on the cross; and they were both the Body and Blood of a God-man. "Do this, He said, in commemoration of Me;" and as long as it was done daily, the double truth, the double benefit of God to man, the double marvel of redeeming love, offering itself and offering what is divine for the erring creature, could not fade from remembrance. It is as present now as it was at the hour of the crucifixion, and will be equally present to the end of the world. But in order better to understand the force and meaning of our Lord's action, it is necessary to consider the institution which, at the time of it, was in existence and full operation all over the world, the institution, that is, of bloody sacrifice. From the beginning of history, and in all countries, the intercourse between God and man consisted in two things, prayer and sacrifice, and they were carried on together. For this much the Greek may fitly represent all Gentilism. Now Plato represents Euthyphron as saying to Socrates, "If any one knows how to say and to do things acceptable to the gods by praying and by sacrificing, that is piety, and such conduct preserves both private families and the commonwealth; and the contrary to these acceptable things is impiety, which overthrows and destroys everything." To which Socrates replies, "You call, then, piety a certain knowledge of sacrifice and prayer." "I do." "Then sacrifice is giving to the gods, and prayer asking of them."[84]