People of God
From the Compendium Catechism:

153. Why is the Church the ‘people of God’?

The Church is the ‘people of God’ because it pleased God to sanctify and save men not in isolation but by making them into one people gathered together by the unity of the Father and the Son and the Holy Spirit.

154. What are the characteristics of the people of God?

One becomes a member of this people through faith in Christ and Baptism. This people has for its origin God the Father; for its head Jesus Christ; for its hallmark the dignity and freedom of the sons of God; for its law the new commandment of love; for its mission to be the salt of the earth and the light of the world; and for its destiny the Kingdom of God, already begun on earth.

155. In what way does the people of God share in the three functions of Christ as Priest, Prophet and King?

The people of God participate in Christ's priestly office insofar as the baptized are consecrated by the Holy Spirit to offer spiritual sacrifices. They share in Christ’s propheticoffice when with a supernatural sense of faith they adhere unfailingly to that faith and deepen their understanding and witness to it. The people of God share in his kingly office by means of service, imitating Jesus Christ who as King of the universe made himself the servant of all, especially the poor and the suffering.

156. In what way is the Church the body of Christ?

The risen Christ unites his faithful people to himself in an intimate way by means of the Holy Spirit. In this way, those who believe in Christ, in as much as they are close to him especially in the Eucharist, are united among themselves in charity. They form one body, the Church, whose unity is experienced in the diversity of its members and its functions.

157. Who is the Head of this body?

Christ “is the Head of the body, the Church” (Colossians 1:18). The Church lives from him, in him and for him. Christ and the Church make up the “whole Christ” (Saint Augustine); “Head and members form, as it were, one and the same mystical person” (Saint Thomas Aquinas). 

158. Why is the Church called the “Bride of Christ”?

She is called the “Bride of Christ” because the Lord himself called himself her “Spouse” (Mark 2:19). The Lord has loved the Church and has joined her to himself in an everlasting covenant. He has given himself up for her in order to purify her with his blood and “sanctify her” (Ephesians 5:26), making her the fruitful mother of all the children of God. While the term “body” expresses the unity of the “head” with the members, the term “bride” emphasizes the distinction of the two in their personal relationship.

159. Why is the Church called the temple of the Holy Spirit?

She is so called because the Holy Spirit resides in the body which is the Church, in her Head and in her members. He also builds up the Church in charity by the Word of God, the sacraments, the virtues, and charisms.

“What the soul is to the human body, the Holy Spirit is to the members of Christ, that is, the body of Christ, which is the Church.” (Saint Augustine)

160. What are charisms?

Charisms are special gifts of the Holy Spirit which are bestowed on individuals for the good of others, the needs of the world, and in particular for the building up of the Church. The discernment of charisms is the responsibility of the Magisterium.