Paul prays "that Christ may dwell in your hearts by faith.” The word dwell means to move in and settle down. This much more than a visit and certainly more than a mailing address. This is a permanent change of address.
In the beginning, God dwelt with Adam and Eve in the Garden of Eden. They sinned and God could no longer dwell in their presence. Once the nation of Israel was formed, God dwelt with his people. First, in the tabernacle and then in the temple. But they continued to sin, and God’s presence left the temple.
However, through the prophets, God promised a new covenant (Jer. 31:31-34). He would put his Spirit inside his people (Ezek. 36:27). To fulfill that promise, Jesus became flesh and dwelt among us, and we beheld His glory (John 1:14). If you are a follower of Christ, your body is a temple.
He dwells in your heart. This is beyond your blood pumping organ; and more than the place where you keep your feelings. It is the very center of your personality. Your mind. Your will. Your soul.
Jesus paid it all and He wants your all. He wants to be the very center of your universe.
As a follower of Christ, you live by faith. The works you do for Christ are according to faith, or they have no eternal value. Furthermore, faith is itself the gift God.
Faith is the conviction that it is no longer you who live, but Christ lives in you. And the life that you now live in the flesh, you live by faith in the Son of God who loved you and gave Himself for you. (Gal. 2:20)
I am the vine; you are the branches.
If you remain in me and I in you,
you will bear much fruit;
apart from me you can do nothing.