Mel-chiz’-ed-ek was King of Salem, and was a priest of the most high God! He was the King who blessed Abraham when he was returning from the slaughter of kings. He was the one whom Jesus himself would be called a high priest forever after the order of Mel-chiz’-ed-ek. (Hebrews 7:1-4) For this Melchisedec, king of Salem, priest of the most high God, who met Abraham returning from the slaughter of the kings, and blessed him; To whom also Abraham gave a tenth part of all; first being by interpretation King of righteousness, and after that also King of Salem, which is, King of peace; Without father, without mother, without descent, having neither beginning of days, nor end of life; but made like unto the Son of God; abideth a priest continually. Now consider how great this man was, unto whom even the patriarch Abraham gave the tenth of the spoils.
Jesus said he did not come to change the law, but to fulfill it. The Levitical priesthood in previous generations was the law put in place. Jesus would be the one who is our Lord who came out of Juda and be a priesthood Moses knew nothing about, therefore he would bring a better and necessary change of the law. (Hebrews 7:11-16) If therefore perfection were by the Levitical priesthood, (for under it the people received the law,) what further need was there that another priest should rise after the order of Melchisedec, and not be called after the order of Aaron? For the priesthood being changed, there is made of necessity a change also of the law. For he of whom these things are spoken pertaineth to another tribe, of which no man gave attendance at the altar.For it is evident that our Lord sprang out of Juda; of which tribe Moses spake nothing concerning priesthood. And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another priest, Who is made, not after the law of a carnal commandment, but after the power of an endless life.
The shed blood of Christ abolished any previous known way of the Priesthood, and his tabernacle (his body) is now in place of any worldly building for his tabernacle (church) abides in heaven. (Hebrews 8:1-2) Now of the things which we have spoken this is the sum: We have such an high priest, who is set on the right hand of the throne of the Majesty in the heavens; A minister of the sanctuary, and of the true tabernacle, which the Lord pitched, and not man. (Hebrews 9:11) But Christ being come an high priest of good things to come, by a greater and more perfect tabernacle, not made with hands, that is to say, not of this building; (Revelation 21:22-27) And I saw no temple therein: for the Lord God Almighty and the Lamb are the temple of it.And the city had no need of the sun, neither of the moon, to shine in it: for the glory of God did lighten it, and the Lamb is the light thereof. And the nations of them which are saved shall walk in the light of it: and the kings of the earth do bring their glory and honour into it. And the gates of it shall not be shut at all by day: for there shall be no night there.And they shall bring the glory and honour of the nations into it. And there shall in no wise enter into it any thing that defileth, neither whatsoever worketh abomination, or maketh a lie: but they which are written in the Lamb’s book of life.