The word Liturgy, which comes from the Greek λειτουργός, is used widely in the New Testament (e.g. Lk 1:23; Acts 13:2; Rom 13:6; 15:16, 27; 2 Cor 9:12; Phil 2:14-17,25,30; Heb 1:7; 8:2, 6). Literally, the ancient Greek word means "public work" or "service in the name of, or on behalf of, the people." In Christian tradition, it means the participation of the People of God in ‘the work of God’ (Catechism of the Catholic Church, 1069). The New Testament scripture references are to the formal public works of the apostles and disciples in worship, proclamation of the Gospel, and charity. They reflect their lived participation in Christ's threefold priestly ministry as Priest (worship), Prophet (proclamation of the Gospel) and King (charity).
When we are baptised, Christ invites us to participate in his priestly ministry. As a member of the Body of Christ, joining the apostles and saints who have gone before us, we are anointed Priest, Prophet and King to continue the work of Christ in the world today.
A Variety of Ministries
There is a diversity of spiritual gifts with which we are gifted. So too, there is a diversity of ministries to which we are called, both ordained and lay. The complementarity of ministries is made manifest when the Church gathers for worship, especially for Mass, from which we are sent to proclaim the Gospel and glorify the Lord by our lives.