The Sacrament of Apostolic Succession
Holy Orders is the sacrament by which men are ordained into the threefold ministry of the Church: deacon, priest (presbyter), and bishop. This ordained ministry is not an administrative structure invented for organizational convenience — it was established by Christ through His Apostles and has been transmitted in an unbroken chain of laying-on of hands from the first generation to the present day. This is the apostolic succession: the living guarantee that the same Church that received the faith from Christ still exists and still exercises His authority in the world.
The Apostle Paul gives the essential statement of the sacramental principle of Holy Orders: "Do not neglect the gift you have, which was given you by prophecy when the council of elders laid their hands on you" (1 Timothy 4:14). The laying-on of hands is not a ceremony — it is a genuine transmission of sacramental grace, a real gift of the Holy Spirit for the specific ministry being undertaken.
"The things you have heard from me in the presence of many witnesses entrust to faithful men, who will be able to teach others also."
2 Timothy 2:2 — The Principle of Apostolic SuccessionThe Three Degrees of Holy Orders
The bishop (episkopos — overseer) stands at the fullness of the ordained ministry. He is the successor of the Apostles, the guardian of the faith in his diocese, and the visible link to the apostolic succession. Orthodox bishops can trace their ordination lineage back through an unbroken chain to the Apostles themselves. Without a valid bishop, there is no valid ordination, no valid Eucharist, and no local church in the full Orthodox sense. The bishop is the source of the sacramental life of his entire diocese.
The priest (presbyteros — elder) serves as the pastor of a local parish. He celebrates the Divine Liturgy, administers the sacraments, preaches, teaches, counsels, and intercedes for his flock. In Orthodoxy, a parish priest is typically a married man — he must marry before his ordination as a deacon. The monastic (celibate) clergy can be elevated to higher offices including the episcopate. Both married and monastic priesthood are equally valid and equally holy: they represent different vocations, each demanding the total gift of self.
The deacon (diakonos — servant) assists the bishop and priest, particularly in the celebration of the Divine Liturgy. He chants the litanies, proclaims the Gospel, assists at the altar, and traditionally serves the poor and the material needs of the community — recovering the ancient office of Acts 6, where the first deacons were appointed precisely to care for those being overlooked in the daily distribution.
The Ordained and the Royal Priesthood
The ordained priesthood does not replace or diminish the royal priesthood of all the baptized — it serves it. The priest at the altar is not offering sacrifice instead of the people but with them and on behalf of them. The whole congregation is a priestly body offering the world to God; the ordained priest makes that offering possible by sanctifying the gifts. Both forms of priesthood are necessary — neither can stand without the other — and together they form the full sacramental life of the Body of Christ.
The priest stands before God on behalf of the whole human race. What an awesome dignity! What a weight of responsibility! The priest trembles — and rightly so — because he holds in his hands the Body and Blood of the Lord of Glory.
— St. John Chrysostom, On the Priesthood