The document discusses the importance of belonging to a local church community rather than trying to follow Christ alone. It argues that Christians are called to belong not just to believe, and that being attached to a local church body is vital for spiritual growth and health, as isolation can lead to decline. Being part of a church family helps believers develop spiritually by moving them out of self-centeredness, identifying them publicly as Christ's disciples through their love for one another, and allowing them to learn fellowship by putting commands to love and serve one another into practice.