You don’t join the family of God, you are born into God’s family. We have been born of the Spirit of God. God’s very own Spirit comes to reside in you. What gives us the right to what God has promised us is our birthright as His children. As sons and daughters of God we are heirs of God and joint heirs with Jesus Christ. We now have an inheritance because we have been born again into the family of God. Everything God has promised us in the New Covenant belongs to us because we are His children. In 2 Corinthians 1:20 we are told that all the promises of God are yes and amen. God shows no favorites in His family. You don’t have to ask God if you can have what He has promised you for He has already said yes. We must give our amen. The amen is a statement of faith that means so be it for me. So as His son or daughter give your amen of faith to what He has promised you and you can walk in your inheritance.