Believers are being prepared to become a kingdom of priests serving under Jesus Christ, our spiritual High Priest, as I Peter 2:4-10 teaches: living stones built into a spiritual house, a holy priesthood and royal priesthood. The Old Covenant priestly symbolism teaches the characteristics needed to work under Him. The onyx shoulder stones, listed in birth order, show the commonality of all the tribes, paralleling Galatians 3:27-29, where all in Christ are one spiritual family, heirs of Abraham's promise regardless of nationality. The breastplate jewels, each different and arranged in the marching order, show diversity of function without ranking, as I Corinthians 12 teaches: one Spirit gives varied gifts, and God sets each member in the body as He pleases, so everyone has a place. The Levites, who carried the tabernacle and camped around it, were protected by the other tribes, while all others had to stay a Sabbath day's journey away. Christ has removed that distance, so believers have access into the spiritual Holy of Holies, and only they themselves can keep themselves out. Gentiles and Israelites alike are brought near by Christ's blood, made fellow citizens and members of God's household, a holy temple built on Christ as cornerstone. Together they form the spiritual "Israel of God," the 144,000 firstfruits who follow the Lamb, and who will serve in His kingdom in assignments not yet specified.

The royal priesthood emerges as a defining characteristic of the new order under Jesus Christ, the High Priest after the order of Melchizedek. In contrast to the Aaronic priesthood, which served only Israel and lacked any royal dimension, this priesthood is explicitly royal because its Head descends from David's line and because those called to serve under Him share that royalty. Scripture states that believers constitute a chosen generation and royal priesthood, confirmed by the declaration that they will reign as kings and priests. This royalty flows from the Father through the Son to those united with Him, setting the priesthood apart as one in which authority and service are joined without irregularity or faction. The topic develops through a series of contrasts that underscore its permanence and scope. The Aaronic system was temporary, physical, and limited; the Melchizedek priesthood is eternal, spiritual, and universal, extending blessing to all nations. Within this framework the royal quality reinforces the requirement of single-minded devotion and holiness, since every priest must reflect the character of the Head who submitted perfectly to the Father. The same unity symbolized by the high priest's garments—white for righteousness, blue for holiness and grace, gold for divinity—now applies inwardly, demanding that thoughts, words, and actions be anchored to holiness to the Lord. This royal priesthood therefore connects directly to the broader message of preparation: those being formed into a spiritual house and holy temple must offer themselves as living sacrifices, imitating Christ's humility and obedience so that the priesthood functions righteously, produces peace, and fulfills its eternal calling to serve God and all nations.

The church is God's royal priesthood, drawn from Exodus 19:4-6, Isaiah 43, and I Peter 2:5, 9: a chosen, holy, unique people, set apart as God's own and formed to show forth His praises. This priesthood is still in training, and it will appear fully formed and formally installed when Christ returns, though it already carries priestly responsibilities. Israel refused to draw near to God at Sinai because it correctly recognized its unfitness, but the church has no such excuse. God Himself calls, cleanses through Christ's blood, reconciles, and makes it partaker of the divine nature, and He alone causes His priests to come near. Aaron's sons became priests by birth into a sinful line, while the church becomes priests by regeneration into the Divine Family. Christ, divine, sinless, and merciful, is the perfect eternal High Priest who first entered God's presence, and the church follows Him as the "first" (the root of "priest") to lead the rest of mankind there later. A priest is a mediator, bridging God and the world. The Old Testament ceremonies foreshadow spiritual realities, so the church is now the temple and, secondarily, the sacrifice. Its work is the daily offering of spiritual sacrifices (Romans 12:1-2, Hebrews 13:15-16): private prayer, study, meditation, thanksgiving, and sharing and encouraging others. Its work also includes public witness, which means a life unconformed to the world and the preaching of the gospel. Because the God who calls is holy, priests must be pure, cleansed by Christ's blood and kept pure through obedience to His Word by His Spirit.

The church is a royal priesthood now, not merely in the future. Revelation 1:6 is better rendered "a kingdom of priests," echoing Exodus 19:6, where Israel failed in that calling, and Peter applies the identity to the church in I Peter 2:5, 9. Unlike benefit-oriented identities such as heirs or children, priesthood stresses responsibility, and it includes the pursuit of holiness. This priesthood differs from the Levitical one: its High Priest is perfect and eternal, its sacrifices are spiritual and self-giving, and its service builds the spiritual temple. Because the Levitical service was a shadow of heavenly realities, its instructions remain the pattern for understanding the role. Hebrews 13:9-10 says believers have an altar from which others may not eat, so the priesthood is fed spiritually on Christ through God's Spirit, and must guard its spiritual diet against strange teachings. The consecration of Aaron's sons (Leviticus 8-9) parallels the Feast of Tabernacles in its seven days plus an eighth, its offerings, its dwelling, and its eating before the LORD. This suggests the Feast is part of the priests' ongoing sanctification. The blood on ear, thumb, and toe points to consecrated hearing, service, and stable walking. Eating the ram and unleavened bread points to Christ. Malachi 1 warns against treating service as drudgery or despising God's table by neglecting His Word. The priesthood is filled by God in order to serve.

God's people are a royal priesthood, as I Peter 2:9-10 declares: a chosen generation, a holy nation, His own special people, called out of darkness into His marvelous light. Revelation 5:10 confirms that they will be kings and priests to God and will reign on the earth. These are the citizens of the Kingdom of God, the elect, the saints, the prophets, and those who fear God's name, small and great. They are those who received Christ and believe in His name, and those led by the Spirit of God, who are sons of God. Israel was first offered this calling. God told them that if they obeyed His voice and kept His covenant, they would be a kingdom of priests and a holy nation (Exodus 19:3-6). They rejected God as their King, so Christ said the Kingdom would be taken from them and given to a nation bearing its fruits, which is now the Church. Even now, believers are ambassadors for Christ and already hold positions in the Kingdom, though they are not yet glorified and have not inherited it. God is building righteous character in them, in the image of His Son, to train them for their ultimate positions as kings and priests who will reign with Christ for 1000 years and forever beyond.