7. The Mysteries
Both the Orthodox and the Roman Catholics recognize at least seven Sacraments or Mysteries: The Eucharist, Baptism, Chrismation, Ordination, Penance, Marriage and Holy Oil for the sick (which the Latins have traditionally called “Extreme Unction” and reserved for the dying).
Concerning the Sacraments in general, the Orthodox teach that their material elements (bread, wine, water, chrism, etc.) become grace-filled by the calling of the Holy Spirit (epiklesis). Roman Catholicism believes that the Sacraments are effective on account of the priest who acts “in the person of Christ.”
At the same time, the Latins interpret the Sacraments in a legal and philosophical way. Hence, in the Eucharist, using the right material things (bread and wine) and pronouncing the correct formula, changes their substance (transubstantiation) into the Body and Blood of Christ. The visible elements or this and all Sacraments are merely “signs” of the presence of God.
The Orthodox call the Eucharist “the mystical Supper.” What the priest and the faithful consume is mysteriously the Body and Blood of Christ. We receive Him under the forms of bread and wine, because it would be wholly repugnant to eat “real” human flesh and drink “real” human blood.
According to Roman Catholic teachings about the Sacraments (mystagogy), a person becomes a member of the Church through Baptism. “Original sin” is washed away. Orthodoxy teaches the same, but the idea of an “original sin” or “inherited guilt” (from Adam) has no part in her thinking. More will be said later on this matter.
Roman Catholics speak of “Confirmation” and the Orthodox of “Chrismation.” “Confirmation” is separated from the Baptism and is performed by the bishop and not the priest; but “Chrismation” is performed with Baptism by a priest who has received “chrism” from the bishop. The Sacrament of “Confirmation” and “Chrismation” both mean the giving of the Holy Spirit. The Latins delay “confirming” (with “first communion”) baptized infants not more than seven years, that is, until the time they have some appreciation of the gift of God.
The Orthodox Church links Baptism, Chrismation and Holy Communion, first the threefold immersion into sanctified water, the “new Christian” rising from the water into the fellowship of the Holy Spirit which leads to union with God. Such is the purpose of membership in the Church.
Ordination is the ceremony which, by the grace and calling of God, elevates a man to the priesthood. The sacerdotal priesthood has three orders: Bishop, presbyter (elder) and deacon. All Christians are priests by virtue of the baptism into Christ Who is priest, prophet and king - for which reason St. Peter refers to the Church as a “royal priesthood” (I Pet. 2:9). The bishop is the “high priest,” the "president of the Eucharist and all the Mysteries. Presbyters and deacons are his assistants. The Latins hold that the presbyter acts “in the person of Christ” when, in fact, he does no more than represent the bishop who is “the living icon of Christ.”
Strictly speaking, Penance - sometimes called “Confession” - should only be received by the believer as a means of re-admission to the Church. For a long time, Penance, or confession of sins, prayer and fasting was employed only for those who had been expelled from the Church (“excommunication”) or who had voluntarily departed (apostasy). The present practice is to receive Penance from a bishop or presbyter for some serious sin before receiving Holy Communion.
Both the Orthodox and the Roman Catholics consider Penance as a Sacrament. Each has different customs surrounding it, such as the confessional booth so common among the latter.
For Roman Catholics, Holy Matrimony is a binding, ostensibly an unbreakable, contract. The man and the woman marry each other with the “church” (bishop or priest) standing as a witness to it. Hence, no divorce under any conditions - no divorce but annulment of the marriage contract if some canonical defect in it may be found which renders it null and void (as if it never took place).
In Orthodoxy, Holy Matrimony is not a contract; it is the mysterious or mystical union of a man and woman - in imitation of Christ and the Church - in the presence of “the whole People of God” through her bishop or his presbyter. Divorce is likewise forbidden, but, as a concession to human weakness, it is allowed for adultery. Second and third marriages are permitted - not as a legal matter - out of mercy, a further concession to human weakness (e.g., after the death of a spouse). This Sacrament, as all Sacraments or Mysteries, is completed by the Eucharist, as St. Dionysius the Areopagite says.
As already mentioned, the Latins conceive Extreme Unction as the final Sacrament, the Sacrament which prepares the believer for death, purgatory and the Age to Come. In Orthodoxy, Holy Oil is received for healing. Often sickness is caused by sin; therefore, Holy Oil or Unction involved Confession of sins. At the end of the rite, the anointed receives Holy Communion.
The Orthodox Church also recognizes kingship, monasticism, blessings of the water, etc. as Mysteries.