What does "live in you" mean? John 15:4 has the phrase "Live in me, and I will live in you." What does it mean to live in someone or to live in God?
Apostle Paul in the book of Ephesians continues this thought known as the “Christocentric” principle.  This principle introduces Christ in us the hope of Glory.  To me it means that we live our lives with Christ being the center of it, and by doing so we find ourselves taking on a new life in Christ.  As Paul stated in Acts 17:28, “In Him we live, and move, and have our being.”  This life is made possible by the “indwelling” holy spirit that Jesus said he would send to us so that we could live in Him, and He in us.