¹¹ So if perfection came through the levitical office of priest (for the people received the Law under the priests), why was there still a need to speak about raising up another priest according to the order of Melchizedek rather than one according to the order of Aaron? ¹² When the order of the priest changes, there has to be a change in the Law as well. ¹³ The person we are talking about belongs to another tribe, and no one ever served at the altar from that tribe. ¹⁴ It’s clear that our Lord came from the tribe of Judah, but Moses never said anything about priests from that tribe. ¹⁵ And it’s even clearer if another priest appears who is like Melchizedek. ¹⁶ He has become a priest by the power of a life that can’t be destroyed, rather than a legal requirement about physical descent. ¹⁷ This is confirmed:

Able to save completely

¹⁸ On the one hand, an earlier command is set aside because it was weak and useless ¹⁹ (because the Law made nothing perfect). On the other hand, a better hope is introduced, through which we draw near to God.