Hebrews 7:15

And what we say is yet more abundantly evident, if after the likeness of Melchizedek there ariseth another priest.

Milligan summarizes the various views of scholars as to just what is "more abundantly evident," as follows:

(1) The distinction between the Levitical priesthood and that of the New Testament (Chrysostom); (2) the fact that our Lord sprang out of Judah (Ebrard); (3) that the Law of Moses is abrogated (Alford); (4) that perfection was not attainable through the Levitical priesthood (Delitzsch); and (5) that a change of the priesthood involves of necessity a change of the law (Tholuck).[18]

Surely, where there are so many learned opinions, one may not be afraid to risk his own judgment. The big thought under consideration here is the abrogation of the entire Hebrew system of religion, which has already been observed under Hebrews 7:11-12 (which see); and the argument, to paraphrase it, is this: (1) it is evident that with the rising of a new and greater priest, not out of Levi but out of Judah, the law was abrogated; (2) but it is "far more evident" that the law was abrogated, when it is considered that the great new high priest is, in addition to being from an unlawful tribe (Judah) as far as the priesthood was concerned, also from an utterly new and different order, that of Melchizedek. Thus, the words "far more evident" stand as the author's evaluation of the two supporting premises for his conclusion that the law was changed, making the latter of the two stronger. The author then reverts to the comparison between Melchizedek and Christ for the further purpose of stressing Christ's superiority and the temporary nature of the law.