Melchizedek is given preeminence over Abraham and ultimately Aaron (the first Levitical high priest). He was appointed by God, not based on his genealogy. His life is referred to without a beginning or an end, typifying an eternal priestly ministry like Christ’s.
John MacArthur on Heb 7:12-14
The Levitical priesthood was replaced by a new Priest, who offered a new sacrifice, under a New Covenant. [Jesus] abrogated the law by fulfilling it (cf. Mt 5:17) and providing the perfect that the law could never accomplish (Mt 5:20).
Hebrews 7:13: “another” – from heteros – means another (of a different/distinct kind); emphasizes it is qualitatively different from its counterpart (comparison); stands in contrast to állos ("another of the same kind").
Anything created by man is flawed. The only perfect commentary is the Bible. In general, you’re better off reading the Bible for yourself.
Good intention is only half the battle. You cannot achieve godly outcomes by merely “feeling” good about how to get there. You must fundamentally depend upon Holy Scripture alone (Jn 17:17).
This “better hope” (Heb 7:19) is the New Covenant made possible by the sacrifice of Christ once and for all (aka – the promise of salvation by grace through faith in Christ alone).
