The church is a priesthood in training, called a "royal priesthood" and "holy priesthood" in I Peter 2:5, 9, drawing on Exodus 19:4-6 and Isaiah 43. Its formal installation comes when Christ returns. Even now it carries priestly duties: offering spiritual sacrifices acceptable through Jesus Christ and showing forth God's praises. Old Covenant ceremonies, as Colossians 2:16-17 and Hebrews 9 show, were shadows that must be raised to their spiritual sense, so the detailed Levitical priestly instructions teach the church what its calling requires. Unlike Israel, which refused to draw near at Sinai, the church has been cleansed internally by Christ's blood and made partakers of the divine nature, so it has no excuse for refusing. God Himself causes it to draw near. A priest, whose name carries the sense of "first," goes before God as a mediator for the world and brings back God's gifts, and the church leads others who will follow later. Christ, sinless, divine, and merciful, is the perfect High Priest, in contrast to the sinful Aaronic priests. Under Romans 12:1-2, believers are both priest and offering, a living sacrifice in every moment of life. This includes private prayer, study, meditation, praise, and sharing with others, and also open witness through a pure, unworldly example and the preaching of the gospel. Purity is required because God is holy, and it is maintained by keeping His Word through His Spirit.

Under Jesus Christ as High Priest, believers are individual priests whose responsibilities resemble those of the Old Testament priesthood, and Hebrews 13:15 identifies praise and thanksgiving as sacrifices a priest offers. Giving thanks requires deliberate thought and meditation on God's creation, His faithful dealings with Israel, and the grace by which He called the weak, and such reflection keeps the priest focused on the Creator, strengthens faith, and fosters humility. Pride, by contrast, breeds forgetfulness of God and sin, as Deuteronomy 8 and the Laodiceans show. Humility matters especially to priests because their service centers on drawing near to God and on intercessory prayer, which is advocacy for others before God and costs time and energy. According to Isaiah 66:2 and James 4:6, God looks to the contrite and resists the proud, so a proud priest's prayers go nowhere. Biblical humility is not low self-esteem or a retiring personality, which can be counterfeited. It is a quality of mind produced by relationship with God, which moves a person to submit in obedience to God and to others for God's sake. Moses, who was humble in God's eyes even when he ordered killings, shows that only God's standard can measure it.

The church is a "royal priesthood" (I Peter), a unique, separated people whose work is to make sacrifices acceptable to God through Jesus Christ and to show forth His praises. Old Covenant rituals and laws, such as clean and unclean meats, the Sabbath, leaven, and the priestly purity rules of Leviticus 22, remind the sanctified who they are and give a visible witness. Their intent remains binding under the New Covenant (Matthew 5:17-19), though physical performance of the sacrifices is not required. The priests alone carried the holy vessels and had to be clean to receive the holy things. Likewise the church, as a priesthood, must keep itself undefiled by the world, since human nature attracts contamination, as Haggai's illustration shows. Where the priests' cleanliness was chiefly physical, the church's is chiefly spiritual, moral, and ethical. Isaiah 52:11, quoted in II Corinthians 6:14-7:1, commands separation and continual self-cleansing. Passover foot washing and the Day of Atonement fast reinforce this yearly, and James, Peter, and John echo it. Believers no longer offer animals at an altar, because under the New Covenant they themselves become the living sacrifice, and the principles of the burnt offering in Leviticus 1-7 guide them. Separation costs real sacrifice, and it must be joined with kindness and humility, unlike the self-righteous Pharisees, so that the witness is attractive.

The priest's responsibility to offer sacrifices to God for the people and for himself carries into the New Covenant, where prayer is a major priestly duty. Hebrews 13:15 is the basis: believers are to offer "the sacrifice of praise to God continually, that is, the fruit of our lips giving thanks to his name." Praise and thanksgiving are therefore sacrifices, products of work rather than casual feelings. Ecclesiastes 9:10 is applied to this: just as requests to God are prepared for at length, thanksgiving requires careful, energetic preparation and thought. Most prayers become mere "gimmees" because blessings are taken as due. I Thessalonians 5:16-18 commands rejoicing always, praying constantly, and giving thanks in every circumstance. This does not mean thanking God for evil, but recognizing His sovereignty and looking for the good in each situation. Thanksgiving grows out of gratitude, the inward readiness to appreciate, and out of a right perspective that sees God's truth as light. Pride is the chief obstacle, since it focuses a person on self and credits self rather than the Creator. Being "poor in spirit" (Matthew 5:3) and humbled by God, as in Deuteronomy 8, enables a priest to see, hear, and taste God in life's events, as David did in Psalms 19 and 34. Priestly prayer thus includes thoughtful, prepared thanksgiving.

Under the New Covenant, a priest's chief responsibility is to draw near to God in prayer, especially intercessory prayer on behalf of others. Humility, joined with faith, praise, thanksgiving, and faithfulness, is what makes a priest effective, since God resists the proud and hears only the humble, as Isaiah 66:2 indicates. The Aaronic priests drew near to God through visible physical service at the Temple, offering animals and incense at the altars, while the spiritual dimension was understated. Under the New Covenant this is reversed: the physical acts are barely seen, since prayer is private, and the spiritual becomes front and center. Hebrews 13:15 identifies prayer, praise, and thanksgiving as a New Covenant sacrifice of the lips, costing time, energy, and thought. True humility is a chosen lowering of oneself before God, modeled by Christ in Philippians 2, and it is cultivated over time. Faithfulness, which is faith in action, requires seeing oneself as a slave whose labor never puts God in debt, so that service is motivated by love rather than reward. Priests must also persevere in prayer without giving up, especially in the end-time, since the faith Christ seeks at His return is the faith that keeps praying.

Fulfilling our responsibilities as priests under the New Covenant depends on a linked set of qualities drawn from Luke 17 and 18: faith, faithfulness, thanksgiving, prayer, and humility. Together they keep life centered on God and His purpose rather than on self, and they build the kind of mind acceptable for the Kingdom. Faith is foundational, since without it pleasing God is impossible, and humility follows closely. Humility means being poor in spirit, which includes both the attitude and the act of submission to God. Faithful performance of duty never puts God in debt, because the priest is the clay and God is the Potter, and everything is owed to Him. Prayer must be constant and persevering, as the parable of the persistent widow shows, because God views time differently and is never too late. Jesus' question about finding "that faith" on earth at His return asks about a faith that perseveres. The Pharisee and the publican show that the quality of approach to God matters. The self-exalting Pharisee's prayer never reached God, while the publican, who compared himself with God and pleaded for mercy, was accepted into God's presence (Isaiah 66:2). Little children model this humble trust, and humility is a choice. Wealth and strength tend to hinder it, as the rich young ruler shows, so salvation is possible only through what God does. Faith, the fear of God, and humility together produce love expressed in obedience.

The new covenant priesthood replaces the Levitical order because that earlier system could not bring perfection. Christ, arising according to the order of Melchizedek, serves as High Priest in the true tabernacle not made with hands. This priesthood is spiritual rather than physical, eternal rather than temporary, and universal rather than limited to Israel. It is also royal, since those called into it are descended from the line of David through their union with Christ, and righteous, consistently producing peace between God and worshipers without faction or irregularity. Christ demonstrated the required submission by repeatedly stating that He came to do the will of the Father who sent Him. Every priest under Him must likewise wear the constant reminder of holiness to the Lord, not on an external turban but in the thoughts and will that direct conduct. Believers are living stones built into a spiritual house and holy priesthood whose central duty is to offer spiritual sacrifices. The foremost sacrifice is the presentation of one's entire body as a living offering, holy and acceptable, which encompasses every faculty of mind and action in continual service. This requires clear distinction between the sacred and the profane, clean and unclean, together with the teaching of God's law. Such service flows from the same pattern of garments that clothed the high priest: gold for divinity, white for righteousness, blue for grace and holiness, scarlet for humanity, and purple for the union of both natures. These elements, now internalized, anchor the priest's life to Christ's own character. The result is a unified priesthood in which every member, empowered by the eternal Spirit, imitates the High Priest's self-offering and thereby prepares to serve forever in the administration of the new covenant.

Under the New Covenant all who are called form a royal priesthood that is developing in the image of Jesus Christ, serving under Him as High Priest. Though the physical arrangements of the Old Covenant priesthood have ended, the responsibility to function as visible and audible links between the initial call to holiness and its fulfillment in the Kingdom remains. Believers therefore act as priests to one another within one family, maintaining intimate association with the Father and the Son while proclaiming His praises. Because they possess the Spirit of God, far more is required of them than was required of Aaron, Eleazar, or the other priests under the former covenant. The Old Testament record supplies the practical instruction and examples needed for this higher standard, showing how God expects every aspect of life to reflect His holiness so that no one profanes what He has sanctified. The goal remains the same as in Exodus 19 and I Peter 2: to become a kingdom of priests and a holy nation that obeys His voice without deviation.

The church is being prepared to become a kingdom of priests under Jesus Christ, the spiritual High Priest (I Peter 2:4-5, 9-10), and the Old Covenant priestly symbolism teaches the characteristics needed for that service. The high priest's onyx shoulder stones, listed in birth order, picture the commonality and equality of all believers, who are one in Christ and Abraham's seed (Galatians 3:27-29). Christ bears them on His shoulder as Shepherd and High Priest. The breastplate jewels, each different, and the tribal marching order picture diversity of gifts and services. Following I Corinthians 12, God places each member in the body as He pleases, so there is a place for everyone, and for the 144,000 as Christ's retinue. The Levites, who carried the tabernacle and were encircled by the other tribes, stood nearest to God's dwelling, while Israel had to keep a Sabbath day's journey away and the temple courts kept people at a distance. Christ has opened the way into the spiritual Holy of Holies, and only we can keep ourselves out. Gentiles and Israelites alike, once far off, are brought near by Christ's blood into one new man, fellow citizens in God's household and a holy temple. This makes them the "Israel of God," a spiritual nation distinct from physical Israel, with worship now funneled through Christ rather than the Jerusalem temple.

The calling of believers finds its ultimate expression in Revelation 5:9-10, where the redeemed are declared kings and priests who will reign on the earth. This destiny gives purpose to the extensive biblical background tracing priesthood from its origins with Adam and Eve, through Cain and Abel's divinely instructed sacrifices, to Melchizedek's priesthood encountered by Abraham, and finally to the Levitical priesthood established at Sinai. This historical foundation demonstrates that priesthood was never a human invention but a structure commanded by God to guide worship and sacrifice. Central to understanding New Covenant priesthood is the transformation of the term "firstborn" from a designation of birth order into a title of honor and rank. Beginning with the dedication of firstborn sons to God after the Exodus, and their later replacement by the Levites in tabernacle service, the term "firstborn" increasingly detached from literal birth order. Reuben lost his birthright despite being literally firstborn, while Joseph, Jacob, and Ephraim each received the title without holding that natural position. Eventually the title expanded to describe entire peoples, as when Ephraim and later all Israel were called God's firstborn. This trajectory culminates in Christ, who, though never born in the sense of having a beginning, is called "the firstborn over all creation" and "the firstborn from the dead"—titles expressing His supremacy and preeminence in both physical and spiritual creation, not His literal birth order. This shift in meaning becomes the key to understanding the priesthood of the New Covenant. Believers, upon receiving God's Spirit, become part of Christ's body, described in Ephesians as the fullness of Him who fills all in all. Because of this union, much of Christ's dignity, supremacy, and responsibility passes to those in Him. Christ is the great High Priest, and believers become priests under Him, joined to the Melchizedek priesthood. Just as the title "firstborn" was granted to those who were not literally first, believers—born spiritually "out of due season"—are made firstborn in Christ, as confirmed in Hebrews 12, which speaks of "the church of the firstborn who are registered in heaven." This is an extraordinary honor rooted entirely in position through Christ rather than natural birth order. The linguistic roots of the word "priest"—drawing from Greek, Hebrew, and Latin—reveal the essential functions this New Covenant priesthood must fulfill: standing before God as His servant, mediating between God and worshippers, and serving as a bridge-builder who instructs, sacrifices, and ministers on behalf of others. The Levitical model, in which the entire tribe was set apart to help the nation of Israel become a "kingdom of priests," foreshadows the greater calling of believers to help make others holy. This holiness requirement is the unifying thread running through the entire development. Since God is holy, those appointed to represent Him and lead others toward Him must themselves be holy, for one cannot make others holy without holiness. Thus, becoming priests in the New Covenant sense requires the same sacrificial putting to death of human nature that has always characterized true worship, making holiness of character and purpose the essential qualification for anyone destined to serve as a priest under Christ, the ultimate Firstborn and High Priest.

Believers are a present royal priesthood offering spiritual sacrifices within the church, nourished by Christ's exclusive altar. The Feast of Tabernacles mirrors Levitical consecration, with its seven-day structure and blood application to ears, thumbs, and toes symbolizing hearing God, serving, and walking steadily. This pattern emphasizes present sanctification over merely prophetic future, inviting believers to be continually filled from God's table. Neglecting this spiritual food risks stagnation, so the feast serves as a vital period of consecation, strengthening believers to serve alongside their High Priest.