For all the promises of God in Him are Yes, and in him Amen, to the glory of God through us.
2 Corinthians 1:20 (NKJV)
All of the promises of God have been made available to us in Christ Jesus. The purpose is so that the glory of God can show up in and through our lives so we may be a blessing to those we come into contact with. New covenant glory shows up in the earth when the finished works of Jesus Christ manifest in the lives of believers.