Melichizedek is a mysterious and interesting character. There is not much canonical that we can know about him, but his real importance is not anything of himself, but rather as a foreshadowing of Jesus. The whole Bible from beginning to end is the story of God's love for us, and more specifically the story of Jesus.
I’m jumping ahead in the thread here with a bit of my own conclusions. There is a big difference between THE Melchizedek and the earthly representative or shadow of the Melchizedek. Just as Jesus Christ is THE Lamb that takes away the sin of the whole world, other lambs were slain yearly as a picture or type. Jesus Christ is THE Melchizedek. The first and only Melchizedek. From Seth on down to Levi, there was always a man who was the type of Melchizedek. This man would be the one who was looked to for instruction in righteousness. I have also seen multiple references to a book or group of prophetic writings or instructions that would be handed down, not from father to oldest son, but from Melchizedek to Melchizedek. Somewhere I’ve got a source that lists the men in order from Seth to Levi. I’ll see if I can find it again.
The Melchizedek priesthood is closely tied to the Kinsman Redeemer or Patriarch of the family, I believe. Job is a great example of a Patriarch who sacrifices and performs under the Melchizedek pattern. He is both a king and priest over his own family and by the end of the book, he is even sacrificing for the unrighteous men that God has given him influence over. If you follow the story of the Exodus there is a reason that God spared the firstborn males. They were to be separated to God for his service. In Exodus 19, God tells Moses that the entire nation would be a peculiar nation of kings and priests. (From what I understand, God was re-instituting a Melchizedek type priesthood). It is only after the orgy and the golden calf that this changes and because the Levites answered Moses’ call to begin killing, God substitutes them for the firstborn to be priests before him, but not kings. Both the priesthood and kingship become substitutionary until such a time as one like Moses would come. The Maccabees became self proclaimed Kings and priests for a time but they kind of jumped the gun on that one by about 170 years.
When Jesus Christ came on the scene, He was THE Melchizedek who was in the beginning with God, who created all things and by whom all things consist, and He became flesh and tabernacled among us, and we beheld HIS glory, the glory as of the “only begotten” of the Father. THE King and The High Priest of the entire universe had come in the fullness of time to perform his role as Kinsman Redeemer and the Saviour of the World. The substitutionary priests and kings were a type of steward for people who had proven that they could not be trusted to follow God on their own without guidance . . . Until The Melchizedek would come who would lead and guide us into all truth.
This is why we are to call no man Pater but God. The newly re-instituted priesthood under Christ was to follow a pattern where each man was king and priest over his own family. These king/priests were to assemble with other king/priests to study and learn and share that knowledge without attempting to coerce a headship over other king/priests around them. That headship belongs solely to The Melchizedek, Christ.
In a recap, the Melchizedek order originates in Christ before creation, its pattern is utilized and well known to the biblical patriarchs until Jacob. Under Jacob, the birthright is split. Judah gets the kingdom and Levi becomes the priest. After a couple hundred years in captivity, the order and format or custom is basically unknown. God then brings out this chosen people, along with a mixed multitude, and begins to re-institute this order at Sinai/Horeb. Because of the sin of the people, God changes it to a substitutionary priesthood for an ordained period of time till the Messiah is scheduled to come. (Even within this period, there are notable exceptions to this substitution, Samuel, David, Solomon to name a few who act at times suspiciously like the Melchizedek order.) Once He comes, there’s no more need for a substitute when the real McCoy is present. The substitutionary priesthood and its system are subsequently done away with. IMHO, this only includes the Levitical and related religious aspects, not the civil or moral parts of the law.
One of the most telling historical snafu’s is when the RCC attempts to reverse engineer a Levitical style priesthood during a Melchizedek priesthood era.
At some point in the future, no doubt the Kohanim will serve again, but IMO it will be under a Melchizedek style priesthood.
Hope this sheds some light. I’ll work on getting some source materials listed and fleshing this out a bit later.
Peace, love and all the fuzzy stuff