§1. 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, made sharers in their own way in Christ’s priestly, prophetic, and royal function, they are called to exercise the mission which God has entrusted to the Church to fulfill in the world, in accord with the condition proper to each.
§2. This Church, constituted and organized in this world as a society, subsists in the Catholic Church governed by the successor of Peter and the bishops in communion with him.
Source: Code of Canon Law (Vatican.va)