Pondering: The Lord as sworn and will not relent. You are a priest forever. Just like Melchizedek.
This is said twice in Scripture referring to Jesus.
So what can we understand?
First: Melchizedek is a priest forever. If Melchizedek's priesthood is forever and unchanging, so is the priesthood of Jesus. God doesn't change his mind. So...is Melchizedek still doing his priestly work? Or has he been, so to speak, retired?
Second: God has given to Jesus a name above all names and everything and everyone must bow their knees to the name of Jesus. So whatever Melchizedek is or is not doing now, he is in no way equal to Jesus.
Third: Jesus is the high priest of our confession. We have been made kings and priests in his kingdom (definitely on earth but will this continue in heaven and the New Jerusalem?) How many eternal priests are there? A high priest is over many priests.
Fourth: No man comes to the Father but by Jesus. This is very important. The Bible doesn't say that no man comes to a good afterlife or to heaven without Christ. It says no man comes to the Father. So we have Lazarus in Abram's bosom. We also have Ezekiel speaking of those who serve the prince but never see his face forever. We have people outside the gates of New Jerusalem. We have the book of Romans and the concept that where there is no law there is no sin. Although sin and death rule over them, there is the law of their conscience. And we have Jesus speaking of those who didn't know the will of God being beaten with fewer stripes. We also have the Great Commission because even unsaved ignorant people who live by their conscience will sin against their conscience. I wonder if Melchizedek is the priest whom God has appointed over these people. But all will be Christ's and at last everything that is Christ will be God's.
Just going through a Biblical rabbit hole. We have to be careful when it comes to rabbit hole theology and doctrine.... especially if ultimately some theory doesn't matter to our own life. It's okay to ponder but our ponderings must always bow to Scripture and this is why we need to know Scripture. So many deceptions have come about in the church because someone missed a Bible verse. I remember a pretty famous preacher going on about God creating many humans in the beginning and calling their name Adam, as a collective. He decided on this because he figured the world couldn't have been so quickly populated. But he missed the verse in Genesis that says Eve was the mother of all living. And he missed the verse which states that through one man sin came to the earth. If Gid had made many Adams then did all the Adams eat the fruit? And if one of the Adams didn't eat the fruit, why didn't God use that tiny remnant? The same way of missing or ignoring or misunderstanding a Bible verse can be found in theology where hell supposedly doesn't exist, or even in the idea that Satan represents collective human evil and tendencies. So when they say Jesus battled Satan's temptation in the wilderness, they forget the verse that the Bible says Jesus knew no sin. This kind of thing goes on in small things...like those who believe in the Sethite theory (as if two different kinds of humans could be good and bad and marrying into the wrong race of humans could create strange beings.)
Anyways...all this is to say that Scriptures are our guidelines in all our ponderings. Or else we'll wrestle scriptures to our destruction.