In First Peter 2:9, true Christians are called “royal priests.” But what does that mean to Christians?
Priesthood has its history in the Old Testament when God appointed Aaron, the brother of Moses, to be the High Priest and his sons were his priests (Exodus 28:1-5). Aaron belonged to the tribe of Levi, the only tribe out of the 12 tribes of Israel who did not have material inheritance but the altar to serve God.
When an Israelite sinned at that time, he could not go direct to God in heaven in prayer to ask forgiveness of his sin. Rather, he would pass through the Levitical priests who would represent him. When the sinner was poor, he would be required to bring a dove. When moneyed, he would be required to bring a sheep without blemish. These would serve as animal sacrifices to be slaughtered by the priests, pouring the blood in the altar as the cleansing of sins. This ritual was repeated yearly.
With the death of the Lord Jesus Christ on the cross, however, the animal sacrifice was put to an end. The Lord Jesus became the Final Sacrifice for the sins of the world. And blood was needed to accomplish it.
Since Jesus Christ started as the Angel of Jehovah God, He could not qualify as the Last Sacrifice if He remained the Angel as angels have no blood. And this is where the mystery is seen. So God transformed His angelic body into man through the virgin birth. As man, He could now shed blood. He did it as His crucifixion, a show of God’s love to mankind.
After His resurrection and ascension to heaven, on that Day of Pentecost in Jerusalem around 30 A.D., the Lord Jesus becomes the High Priest of Christians (Hebrews 4:14). At the same time, He becomes the only Mediator between God and men (1 Timothy 2:5), meaning no one can come to God the Father without passing through Him. And on that Day of Pentecost too, His church was born. His church is composed of His followers (Christians) which is His Body, and He is the Head of the Body (Colossians 1:18; Ephesians 5:23). Hence, the Lord Jesus becomes the Master of Christians and Christians His servants. This Master-Servant relationship has to be guarded against disobedience to Him to avoid divine discipline.
Being the High Priest in the New Testament, therefore, His followers are automatically His priests, in fact royal ones (1 Peter 2:9)! As priests, Christians can now go direct in prayer to God in Christ’s name without the mediation of any man. So other so-called priests now requiring others to come to them in prayer are out of line because the old priesthood has been done away with. And any other claiming to be the High Priest today is rejecting the Lord Jesus as the only High Priest. The disobedient will then receive what he deserves when he faces the Lord Jesus on Judgment Day.
The advice is, obey the written Word of God in the New Testament, especially the teachings of the Lord Jesus, and God’s blessings will be poured in to you.