Now if perfection had been attainable through the Levitical priesthood (for under it the people received the law), what further need would there have been for another priest to arise after the order of Melchizedek, rather than one named after the order of Aaron?
Those who formerly became priests took their office without an oath, but this one was addressed with an oath, “The Lord has sworn and will not change his mind, ‘Thou art a priest for ever.’ ”
He is without father or mother or genealogy, and has neither beginning of days nor end of life, but resembling the Son of God he continues a priest for ever.