Jesus Christ is the one whom the Father anointed with the Holy Spirit and established as priest, prophet, and king. The whole People of God participates in these three offices of Christ and bears the responsibilities for mission and service that flow from them. On entering the People of God through faith and Baptism, one receives a share in this people’s unique, priestly vocation: … The baptized, by regeneration and the anointing of the Holy Spirit, are consecrated to be a spiritual house and a holy priesthood.” “The holy People of God shares also in Christ’s prophetic office,” above all in the supernatural sense of faith that belongs to the whole People, lay and clergy, when it “unfailingly adheres to this faith . . . once for all delivered to the saints,” and when it deepens its understanding and becomes Christ’s witness in the midst of this world. Finally, the People of God shares in the royal office of Christ. He exercises his kingship by drawing all men to himself through his death and Resurrection. Christ, King and Lord of the universe, made himself the servant of all, for he came “not to be served but to serve, and to give his life as a ransom for many.” For the Christian, “to reign is to serve him,” particularly when serving “the poor and the suffering, in whom the Church recognizes the image of her poor and suffering founder.” The People of God fulfills its royal dignity by a life in keeping with its vocation to serve with Christ.
— (CCC, 783-786)
AN EXCERPT FROM
Catechism of the Catholic Church