The bible say's Jesus was a priest forever in the order of Melchezidek, in Hebrews. The Lambs book of life contains all the names of those who will be saved. God calls the saved, Kings and Priests. If Jesus is our high Priest in the order of Melchizedek, then we are Priests also in the order of Melchizedek forever.
This was ordained before God ever said; "Let there be light." The bible is a book that the carnal mind can understand, but only the Holy Spirit can teach the mysteries of the Bible. Jesus asked the apostles; "Who do men say that I am?" They said John the Baptist, Elijah or one of the prophets.
Peter said; "You are the Christ, the Son of the Living God." Jesus said that man did not teach you that, God did. First Corinthians chap. two says,the carnal mind cannot understand the things of God, they are Spiritually discerned.
If you do not have The Holy Spirit teaching you, then you will never understand the Bible Spiritually.