It is written;
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.
In Hebrews 7-10 the Spirit of the Christ is telling us about a Priesthood, given exclusively to the Levites, that the Christ replaced with Himself.
In the verses above, it tells about the implications of such an event. According to Moses, God separated Levi, unto Himself, from the rest of the Tribes of Israel, and made a Covenant with them on Israel's behalf. According to this Covenant, given on Mt. Sinai, Aaron and his sons were to be the exclusive "ministers" whose duty it was to administer God's Laws, and to Provide for the atonement of men who had transgressed God's Laws.
In Jer. 31, the Word of God which became Flesh, promised a time "after those days" when HE would take over the Administration of God's Laws, and provide for the atonement of men who transgressed God's Laws Himself.
I have heard religious men, who call Jesus Lord, Lord, teach that the Christ replaced the Priesthood because the Children of Israel rebelled against God's Laws.
I know this is a popular teaching of the religions of the land, but, in my view, the Scriptures point to a different reason for the "Change of the Priesthood. The short version of what I see as God explaining why the Priesthood changed follows.
Matt. 15:24 But he answered and said, I am not sent but unto the lost sheep of the house of Israel.
I asked God "Why was Israel lost"? And God provided me the answer to my question.
Jer. 50:6 My people hath been lost sheep: their shepherds have caused them to go astray, they have turned them away on the mountains: they have gone from mountain to hill, they have forgotten their restingplace.
And again;
Ez. 34:2 Son of man, prophesy against the shepherds of Israel, prophesy, and say unto them, Thus saith the Lord GOD unto the shepherds; Woe be to the shepherds of Israel that do feed themselves! should not the shepherds feed the flocks?
8 As I live, saith the Lord GOD, surely because my flock became a prey, and my flock became meat to every beast of the field, because there was no shepherd, neither did my shepherds search for my flock, but the shepherds fed themselves, and fed not my flock;
So what does God promise to do?
11For thus saith the Lord GOD; Behold, I, even I, will both search my sheep, and seek them out.
12 As a shepherd seeketh out his flock in the day that he is among his sheep that are scattered; so will I seek out my sheep, and will deliver them out of all places where they have been scattered in the cloudy and dark day.
So then, is this really why Israel went astray? Because the Shepherds God placed over them turned away from God?
Listen to the Christ, The Word of God which became Flesh, tell us about His Covenant with Levi.
Mal. 2:4 And ye shall know that I have sent this commandment unto you, that my covenant might be with Levi, saith the LORD of hosts.
5 My covenant was with him of life and peace; and I gave them to him for the fear wherewith he feared me, and was afraid before my name. (EX. 32)
6 The law of truth was in his mouth, and iniquity was not found in his lips: he walked with me in peace and equity, and did turn many away from iniquity.
7 For the priest's lips should keep knowledge, (Like Jesus) and they should seek the law at his mouth: for he is the messenger of the LORD of hosts.
8 But ye are departed out of the way; ye have caused many to stumble at the law; ye have corrupted the covenant of Levi, saith the LORD of hosts.
9 Therefore have I also made you contemptible and base before all the people, according as ye have not kept my ways, but have been partial in the law.
So what did the Christ do? Did HE not promise a New Covenant in which HE will administer God's Laws, not the Levite. And didn't HE Promise to atone for men who had transgressed God's Commandments, not the "deeds" of the sacrificial Law given to Levi?
Heb. 8:7 For if that first covenant had been faultless, then should no place have been sought for the second.
8 For finding fault with them, (The Shepherds which led Israel Astray) he saith, Behold, the days come, saith the Lord, when I will make a new covenant with the house of Israel and with the house of Judah:
So isn't the New Covenant, according to the Christ Himself, the New Priesthood?
What are your thoughts.
Because the law has changed.
We are no longer under the law of Moses.
The Church is under the law of Christ, as He is the Mediator of the New Covenant.
Bear one another’s burdens, and so fulfill the law of Christ. Galatians 6:2
JLB