In the series “10 reasons why Melchizedek was actually the pre-incarnate Word of God” the following article is reason # 7.
Melchizedek’s priesthood is said to result in perfection.
Hebrews 7:25 reveals that one of the qualities of a perfect priesthood is the priest’s ability to perpetually intercede on behalf of the priesthood’s subjects. Melchizedek is said to abide a priest continually so his priesthood definitely has this quality of perfection; yet, only God inherently possesses the power of an endless life therefore only God can truly meet this criteria. How could a priest who is merely a man spearhead a priesthood that brings about perfection if this priest is not God Himself? This is the riddle that Hebrews 7:11 presents us with, for it reads:
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?
The good and necessary consequence of Hebrews 7:11, 19 & 25 is that perfection is a by-product of the Melchizedek priesthood. And if so, then Melchizedek must be Jesus Christ for only Christ is able to save believers to the uttermost seeing as how Christ and Christ alone ever liveth to make intercession for them that come unto God by Him. Furthermore, Hebrews 7:26 says that the high priest described in Hebrews 7:24 & 25 became one of us. This implies that Jesus was a high priest before He became one of us and if so then who else could Melchizedek have been except Christ?