It's either Heb 9 or 10 which speaks of Christ as entering the heavenly holy of holies "not with the blood of bulls and goats, but with his own blood," and says that he *will* appear a second time (that is, at the Second Coming). This is a direct reference to the Temple liturgy for Yom Kippur, in which the High Priest entered the holy of holies (the only time he was permitted to do that).
This means that Christ is an eternal priest ("you are a priest forever, in the order of Melchizedek"). Priests offer sacrifices, eternal priests offer eternal sacrifices.
Plenty of references in the Church Fathers to the Eucharist as a "sacrifice," going back all the way to Apostolic times. Christ's suffering ended at Calvary, but his priesthood did not.
Agreed. That is what I said earlier. Don't get hung up on the verb tenses in Hebrews; they're essentially metaphorical. The point of Christ "sitting down" at God's right hand is that he is equal to God, not a servant.
Oh, I am not "hung up" on the verb tenses. They are just one way the Word refutes what was said earlier. Jesus said that every stroke of every letter will remain until all has been fulfilled. It hasn't, and so the tenses are not just metaphorical. They are there for a reason - His reason!
Sitting down is not just about being equal to God the Father. You have missed a lot of what scripture says metaphorically if you think that is all it is about. It has to do with the fact that His work as High Priest - to atone for sins is now finished, as He said on the cross.
This means that Christ is an eternal priest ("you are a priest forever, in the order of Melchizedek"). Priests offer sacrifices, eternal priests offer eternal sacrifices.
Absolutely. He is our High Priest. He always has been, He always will be. He "stepped into" time to perform His sacrifice, once for all with eternal results. However, again, the tenses show that the sacrifice is not eternally happening but that it happened once and the results are eternal. Now I know that you don't believe that and I doubt I will convince you - that is the job of the Holy Spirit - if you so desire. I have no desire to change your mind, and I am steadfastly firm so you won't change mine either. I am not interested in debates. That isn't why I stepped in here. But the reasons I did are likely finished. We will see.