Why is the concept of being brethren of Christ important for Christians?

The concept of being brethren of Christ is vital for Christians as it emphasizes our identity as part of God's family through adoption. Passages like John 7 reveal that Christ's earthly family, though initially unbelieving, ultimately underscore the transformative effect of faith and the unity Christians share as children of God. Romans 8:15 states that we are given the Spirit of adoption, allowing us to call God our Father, which beautifully encapsulates this familial relationship. This identity carries implications for how we relate to one another in love, service, and mutual support, revealing that our loyalty to Christ takes precedence over earthly familial ties (Luke 14:26).