Why is the concept of the family of God important for Christians?

The family of God is a vital concept for Christians, highlighting the relationships built among believers. Jesus promises that forsaking earthly family for His sake will result in gaining a family of believers who support and care for one another. This reflects the nature of the church as a community of faith where spiritual bonds are prioritized over biological ones, fostering love and service among members. In Mark 10:30, Jesus assures us that we will receive 'a hundredfold' in familial relationships within the body of Christ, reinforcing the importance of our spiritual family.