Heb 7:8    And here men that die receive tithes; but there he receiveth them, of whom it is witnessed that he liveth.

     And even men that die receive tithes of the people, yet this Melchizedek was alive when He received tithes of Abraham. When Abraham tithed to Him, it wasn't an act of charity for someone's death in the family. This Melchizedek lived!

Heb 7:9    And as I may so say, Levi also, who receiveth tithes, payed tithes in Abraham.
10    For he was yet in the loins of his father, when Melchisedec met him.

     Even the Old Covenant Law provided for the sons of Levi to receive and pay tithes, but... Levi and his sons weren't even born yet at that time! But still, this Melchizedek lived then, and was already receiving tithes! Who was this Melchizedek with such Authority? (Many of you already know, but for others, I'm not tellin' yet.)

Heb 7:11    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?

     If the Law of The Old Covenant were perfect, and could have offered us Salvation, having been prepared by God through the Levitical priesthood, then why in the world would anyone ever need, or want anything better? Why would there ever arise a need for "another priest" after the order of Melchisedec? Why couldn't the Levitical priesthood and the sons of Aaron be enough for helping us atone for our sins to God?

Heb 7:12    For the priesthood being changed, there is made of necessity a change also of the law.
13    For He of Whom these things are spoken pertaineth to another tribe, of which no man gave attendance at the altar.
14    For it is evident that our Lord sprang out of Juda; of which tribe Moses spake nothing concerning priesthood.

     If that first Old Covenant order of Levitical priesthood couldn't fulfill the need for our redemption, then it had to change to something better. If that original priesthood had to change, then The Law had to change along with it. For this Melchisedec Whom is spoken of here, is of another tribe, that of Judah, which had no service among the Levitical priesthood.
     This Melchizedek is our same Lord and Savior Jesus Christ, later born of the 'house of David' from the tribe of Judah. Yet in Abraham's presence He served as High Priest to him, even though Moses didn't even say anything of His duties as Priest when God gave The Law on the Mount.

Heb 7:15    And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another Priest,
16    Who is made, not after the law of a carnal commandment, but after the power of an endless life.
17    For He testifieth, "Thou art a Priest for ever after the order of Melchisedec."

     It is clearly evident then, that "another Priest" is needed Which can take us past that Old Covenant, a limited Covenant of flesh bondage, and one not able to give us Salvation unto an "endless life". God knew we would need a Spiritual Covenant, The New Covenant, to offer us true redemption of our souls back to Him in everlasting Life. And The Father thus said to The Son, "Thou art a Priest for ever after the order of Melchisedec" (quoted from Psalms 110).

Heb 7:18    For there is verily a disannulling of the commandment going before for the weakness and unprofitableness thereof.
19    For the law made nothing perfect, but the bringing in of a better hope did; by the which we draw nigh unto God.