Hebrews 7:15-21

And this becomes even more clear when we see that another priest comes who is like Melchizedek. He was not made a priest by human rules and laws but through the power of his life, which continues forever. It is said about him, “You are a priest forever, a priest like Melchizedek.” The old rule is now set aside, because it was weak and useless. The law of Moses could not make anything perfect. But now a better hope has been given to us, and with this hope we can come near to God. It is important that God did this with an oath. Others became priests without an oath, but Christ became a priest with God’s oath. God said: “The Lord has made a promise and will not change his mind. ‘You are a priest forever.’ ”