Catechism in a Year
Tuesday, June 12, 2018
177. Who are the faithful?
The Christian faithful are those who, inasmuch as they have been incorporated in Christ through Baptism, have been constituted as the people of God; for this reason, since they have become sharers in Christ's priestly, prophetic and royal office in their own manner, they are called to exercise the mission which God has entrusted to the Church. There exists a true equality among them in their dignity as children of God.
Further reading: CCC 871-872
178. How are the people of God formed?
Among the faithful by divine institution there exist sacred ministers who have received the sacrament of Holy Orders and who form the hierarchy of the Church. The other members of the Church are called the laity. In both the hierarchy and the laity there are certain of the faithful who are consecrated in a special manner of God by the profession of the evangelical counsels: chastity or celibacy, poverty, and obedience.
Further reading: CCC 873, 934
These excerpts are from the Compendium of the CCC