Hebrews chap 9:24-28 reads For Christ is not entered into the holy places made with hands, [which are] the figures of the true; but into heaven itself, now to appear in the presence of God for us: Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others; For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself. And as it is appointed unto men once to die, but after this the judgment: So Christ was once offered to bear the sins of many; and unto them that look for him shall he appear the second time without sin unto salvation. Now the word once in the last verse means it has perpetual validity requiring no repetition: like a birth certificate or a death certificate. and if Heb 10:14 says For by one offering he hath perfected for ever them that are sanctified. Why would Christ need to be re-crucified?
The Catholic Church has never taught that its priests re-crucify Christ at Mass. What they offer is the SAME sacrifice of Jesus. The moment in which He died was the most sacred and significant moment in the history of creation. That moment was and is an eternal moment, covering everyone who has ever lived or will love. But not only does it transcend time, it also remains IN time as the Eucharist. It is significant that when the Protestant reformers separated belief in the Eucharist from the Sacrifice on Calvary, the Eucharist for them, tended to become merely a symbol and the significance of Calvary became muted in their worship from what it had been for all of Christianity for sixteen centuries--and still is for the Catholic and Eastern Orthodox Churches.
Fr. Vincent Serpa, O.P.