This is another one
If Christ were on earth he would not be a priest.
And God swore an oath saying HE was a priest forever.
So how then could Christ separate Himself from God the Father and depart to rule on earth for 1000 years, with the Father still reigning in heaven, see this is not scripturally supported.
To be the mediator of the New Covenant, He must reign and sit at the Father's side.
Hebrews 8
Now this is the main point of the things we are saying: We have such a High Priest, who is seated at the right hand of the throne of the Majesty in the heavens, 2 a Minister of the [a]sanctuary and of the true tabernacle which the Lord erected, and not man.
3 For every high priest is appointed to offer both gifts and sacrifices. Therefore
it is necessary that this One also have something to offer.
4 For if He were on earth, He would not be a priest, since there are priests who offer the gifts according to the law; 5 who serve the copy and shadow of the heavenly things, as Moses was divinely instructed when he was about to make the tabernacle. For He said, “See
that you make all things according to the pattern shown you on the mountain.” 6 But now He has obtained a more excellent ministry, inasmuch as He is also Mediator of a better covenant, which was established on better promises.
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Hebrews 7
Need for a New Priesthood
11 Therefore, if perfection were through the Levitical priesthood (for under it the people received the law), what further need
was there that another priest should rise according to the order of Melchizedek, and not be called according to the order of Aaron? 12 For the priesthood being changed, of necessity there is also a change of the law. 13 For He of whom these things are spoken belongs to another tribe, from which no man has [
b]officiated at the altar.
14 For
it is evident that our Lord arose from Judah, of which tribe Moses spoke nothing concerning [
c]priesthood. 15 And it is yet far more evident if, in the likeness of Melchizedek, there arises another priest 16 who has come, not according to the law of a fleshly commandment, but according to the power of an endless life. 17
For [d]He testifies:
“You are a priest forever
According to the order of Melchizedek.”
18 For on the one hand there is an annulling of the former commandment because of its weakness and unprofitableness, 19 for the law made nothing [
e]perfect; on the other hand,
there is the bringing in of a better hope, through which we draw near to God.
Greatness of the New Priest
20 And inasmuch as
He was not
made priest without an oath 21 (for they have become priests without an oath, but He with an oath by Him who said to Him:
“The Lord has sworn
And will not relent,
‘You
are a priest [
f]forever
According to the order of Melchizedek’ ”),
22 by so much more Jesus has become a [
g]surety of a better covenant.
23 Also there were many priests, because they were prevented by death from continuing. 24 But He, because He continues forever, has an unchangeable priesthood. 25 Therefore He is also able to save [
h]to the uttermost those who come to God through Him, since He always lives to make intercession for them.
26 For such a High Priest was fitting for us,
who is holy, [
i]harmless, undefiled, separate from sinners, and has become higher than the heavens; 27 who does not need daily, as those high priests, to offer up sacrifices, first for His own sins and then for the people’s, for this He did once for all when He offered up Himself. 28 For the law appoints as high priests men who have weakness, but the word of the oath, which came after the law,
appoints the Son who has been perfected forever.