How do we know believers are part of God's family?

The assurance of being part of God's family is rooted in our response to the word of God. In Luke 8, Jesus explicitly states that those who hear the word and act upon it are considered his mother and brethren. This affirms the doctrine of adoption, where believers, through faith in Christ, become children of God. Thus, faith and obedience are the definitive markers of our inclusion in the spiritual family of Christ, underscoring the significance of God’s grace in drawing us into this relationship.