To what purpose do you offer me the multitude of your victims, saith the Lord? I am full, I desire not holocausts of rams, and fat of fatlings, and blood of calves, and lambs, and buck goats. (Isaiah 1)
I will not take calves out of thy house: nor he goats out of thy flocks. For all the animals of the forest are mine, and I own the cattle on a thousand hills. I know every bird in the mountains, and the creatures of the field are mine.
If I were hungry I would not tell you, for the world is mine, and all that is in it. Do I eat the flesh of bulls or drink the blood of goats?
Offer to God a sacrifice of thanksgiving, and perform your vows to the Most High, and call upon me in the day of trouble; I will deliver you, and you shall glorify me.” (Psalm 50)
What is the Sacrament of the Eucharist called? (CCC 1330) The Holy Sacrifice, because it makes present the one sacrifice of Christ the Savior and includes the Church’s offering. The terms holy sacrifice of the Mass, “sacrifice of praise,” spiritual sacrifice, pure and holy sacrifice are also used, since it completes and surpasses all the sacrifices of the Old Covenant.
The sacrifice of the Holy Eucharist: from the Greek: eukharistia, “thanksgiving”.
(CCC 1360) The Eucharist is a sacrifice of thanksgiving to the Father, a blessing by which the Church expresses her gratitude to God for all his benefits, for all that he has accomplished through creation, redemption, and sanctification. Eucharist means first of all “thanksgiving.”