The document outlines the four marks of the Catholic Church:
1. The Church is one in unity under one God and Christ, forming one body and spiritual community.
2. The Church is holy through the indwelling of the Holy Spirit and the love of God, shown through acts of charity despite human sinfulness.
3. The Church is catholic or universal in its mission from Christ to all people and representing the fullness of salvation.
4. The Church is apostolic by continuing the teachings and mission of the Apostles through their successors until Christ's return.