Therefore you and your sons with you shall attend to your priesthood for everything at the altar and behind the veil; and you shall serve. I give your priesthood to you as a gift for service, but the outsider who comes near shall be put to death (Numbers 18:7, NKJV).
Aaron and his sons were appointed to the priesthood by God to serve Israel under the Law of Moses. God said to Aaron, “And you shall attend to the duties of the sanctuary and the duties of the altar, that there may be no more wrath on the children of Israel” (Num. 18:5). Under the covenant of Christ, the priesthood has changed. Jesus Christ is High Priest, not Aaron. (Consequently, the law has changed, Heb. 7:11-12.) Now, every Christian is a priest who offers up spiritual sacrifices to God in the house of God, the church (1 Pet. 2:4-5, 9). Just as the priesthood of Aaron was a “gift of service,” even so Christ, our High Priest, serves our spiritual needs (Heb. 2:17; 7:24-28). Furthermore, Christians are privileged to approach God in prayer and praise through Christ, not through another man (Heb. 4:14-16). Christians do not go to human priests to confess sin and receive pardon from sin. Instead, we boldly go to “the throne of the Majesty in the heavens,” where Christ intercedes for us (Heb. 7:25; 8:1-2; 1 John 1:9-2:1). Our priestly duty is to “continually offer the sacrifice of praise to God, that is, the fruit of our lips, giving thanks to His name” (Heb. 13:15). As priests, our “gift for service” includes offering our bodies as living sacrifices to Him (Rom. 12:1). Priesthood is about service, not power.