The document outlines the four marks of the Catholic Church: 1. The Church is one in unity under one God and founded by Jesus Christ to gather all people into one body. 2. The Church is holy through the indwelling of the Holy Spirit and the love of God, shown through loving service to others. 3. The Church is catholic or universal in its mission from Christ to all of humanity in every place and time. 4. The Church is apostolic by being built on the foundation of the Apostles and continuing their teachings through their successors until Christ's return.