Hebrews 7:24

“But this man, because he continueth ever, etc..] Though he died, death did not forbid him to continue, as it does other men; he was not forced to die, he died voluntarily; and he continued but for a small time under the power of death; besides, his death was a branch of his priestly office: so that he not only continued in his divine nature, which still had the human nature in union with it, but he continued in his office as a priest, and quickly rose from the dead; and the virtue of his sacrifice always remains, and he himself ever lives as an intercessor: wherefore he hath an unchangeable priesthood; which will never be antiquated, and give place to another; nor does it, or ever will it…”

“he--emphatic; Greek, "Himself." So in Psa 110:4, "THOU art a priest"; singular, not priests, "many." continueth--Greek, simple verb, not the compound as in Heb 7:23. "Remaineth," namely, in life. unchangeable--Greek, "hath His priesthood unchangeable"; not passing from one to another, intransmissible. Therefore no earthly so-called apostolic succession of priests are His vicegerents. The Jewish priests had successors in office, because "they could not continue by reason of death." But this Man, because He liveth ever, hath no successor in office, not even Peter (Pe1 5:1).”

“But this man - Greek “But he” - referring to Christ. Because he continueth ever - Greek “Because he remains forever.” The idea is because he does not die, but ever lives, he has an unchanging priesthood. There is no necessity that he should yield it to others, as was the case with the Jewish priests because they were mortal. The reason in their case, why it passed to others, was not that they did not perform the office well, but that they were mortal, and could not continue to hold it. But this reason could not operate in the case of the Lord Jesus, and therefore his priesthood would be permanent. Hath an unchangeable priesthood - Margin, “or, “which passeth not from one to another.” The…”

“He continueth for ever - In life and in his priesthood. That passeth not away - To any successor. Hebrews 7:25”

“But: Ο δε \[Strong's G1161\], But he, that is, Christ, because "he continueth ever," hath απαραβατον \[Strong's G531\], ιερωσυνην \[Strong's G2420\], "a priesthood that passeth not away from him." he continueth: Heb. 7:8-25, Heb 7:28, Heb 13:8; Isa 9:6, Isa 9:7; Joh 12:34; Rom 6:9; Rev 1:18 hath: Sa1 2:35 an unchangeable priesthood: or, a priesthood which passeth not from one to another Hebrews 7:25”