So one of the key verses that we need to wrap our heads around is Hebrews 7:12 "For when the priesthood is changed, of necessity there takes place a change of law also." So, the first thing we need to understand is why certain laws were abrogated from the Old Testament, such as the dietary regulations; is because we are under this new priesthood where Christ is our high priest in the order of Melchizedek. This is not to say many of the laws of the Old Testament are not re-affirmed in the New Testament - all of the 10 commandments are re-affirmed in the New Testament over and again except for the Sabbath, as the Sabbath is now embodied in the person of Jesus Christ, and He is our rest! (Hebrews 1 - 4) Also, the sacrificial laws have been completely abrogated (this is also for you journeyman) as (Hebrews. 9:11-12) "But when Christ appeared as a high priest of the good things to come, He entered through the greater and more perfect tabernacle, not made with hands, that is to say, not of this creation; and not through the blood of goats and calves, but through His own blood, He entered the holy place once for all, having obtained eternal redemption." The shadows of all the sacrifices in the Old Testament 1) Burnt Offering, 2) Grain and Wine Offering, 3) Peace Offering, 4) Sin Offering, and 5) The Transgression Offering, could never compare with Christ's one-time perfect gift of His own blood!
So if Christ is our High Priest in the order of Melchizedek, who are we? 1) We as believers are all Royal Priests (1Peter 2:9) "But you are A CHOSEN RACE, A royal PRIESTHOOD, A HOLY NATION, A PEOPLE FOR God’s OWN POSSESSION, so that you may proclaim the excellencies of Him who has called you out of darkness into His marvelous light." And the fact of our Royal Priesthood is re-affirmed in Titus 2:14, Revelation 1:6, and Revelation 5:10. 2) We (our lives and bodies) are the sacrifice (Romans 12:1) "Therefore I urge you, brethren, by the mercies of God, to present your bodies a living and holy sacrifice, acceptable to God, which is your spiritual service of worship." Also, see the following verses on Christians being the sacrifice: Philippians 2:17-18, 1 Peter 2:5, and Hebrews 13:5. 3) And finally, we (Christians) are the Temple of God (1Peter 2:4-5) "And coming to Him as to a living stone which has been rejected by men, but is choice and precious in the sight of God, you also, as living stones, are being built up as a spiritual house for a holy priesthood, to offer up spiritual sacrifices acceptable to God through Jesus Christ." Also, see the following verses on Christians being God's Temple: Ephesians 2:19-22, 1 Corinthians 3:16-17, 1 Corinthians 6:19-20, 2 Corinthians 6:16, Revelation 3:12.
So now we understand that Christ is our High Priest in the order of Melchizedek, and Christians are priests, the sacrifice and God's Temple, we can look at the book of Revelations with fresh eyes and not with the eyes of a cessationist who sees no connection between the Old Testament and the New Testament. Since one of the main themes of the book of Revelation is clearly about the operation of the Heavenly Tabernacle (Revelation 3:12, 7:15, 11:1, 19, 13:6, 14:15, 15:5, 6, 8, 16:1, 17, 21:3, 22.), and we can find all of the elements of the Wilderness Tabernacle and Solomon's Temple in it (The Menorah Rev 1:10 - 16, The Brazen Sea Rev 4:2, 15:2, The Lamb Sacrifice Rev 5:5-6, The Priesthood Rev 5:9, 10, The Altar Rev 6:9-10, 8:3, Ark of the Covenant Rev 11:19, and the Showbread Table Rev 14:14-20.) the High Priest must be here somewhere! Without question, the vision John sees in Revelation 1:10-20 is our glorified Saviour as he says in (Revelation 1:17-18) "Do not be afraid; I am the first and the last, and the living One; and I was dead, and behold, I am alive forevermore, and I have the keys of death and of Hades." I am simply assigning Him the title Melchizedek because that is who we know he is within the context of this Heavenly Tabernacle in the Book of Revelation.
