Paul explains the glory of the old covenant and the surpassing glory of the new covenant, along with how Christ unveils human hearts so that they see God’s glory and grow in sanctification.
Joy is found in God Alone. God causes the Israelites to have joy and commit themselves to joyous praise. He teaches them where to locate their joy and how to have joy that isn’t based on feelings or circumstances but based on an everlasting relationship with Him.