Bishop: a person who supervises a number of local churches or a diocese, being in the Greek, Roman Catholic, Anglican, and other churches a member of the highest order of the ministry
Covenant:
a the conditional promises made to humanity by God, as revealed in Scripture.
b the agreement between God and the ancient Israelites, in which God promised to protect them if they kept His law and were faithful to Him.
Deacon: (in hierarchical churches) a member of the clerical order next below that of a priest.
Dispensation: an official document authorising such a relaxation of law.
Ecclesial: pertaining to a church or its functions, teachings, or organisation.
Gnosticism: a group of ancient heresies, stressing escape from this world through the acquisition of esoteric knowledge.
Gospel: the teachings of Jesus and the apostles; the Christian revelation.
Heresy: any belief or theory that is strongly at variance with established beliefs, customs, etc.
Liturgy: a form of public worship; ritual.
New Testament: the collection of the books of the Bible that were produced by the early Christian church, comprising the Gospels, Acts of the Apostles, the Epistles, and the Revelation of St. John the Divine.
Old Testament: the first of the two main divisions of the Christian Bible, comprising the Law, the Prophets, and the Hagiographa. In the Vulgate translation all but two books of the Apocrypha are included in the Old Testament.
Priest: a person whose office it is to perform religious rites, and especially to make sacrificial offerings.
Psalm: a sacred song or hymn.
Rite: a formal or ceremonial act or procedure prescribed or customary in religious or other solemn use
Scripture: the sacred writings of the Old or New Testaments or both together.