Why is the concept of Christ in us important for Christians?

The significance of Christ in us cannot be overstated in the Christian faith. This doctrine highlights that believers do not merely follow a set of rules or a moral code; rather, they possess the life of Christ within them (Galatians 2:20). This union means that Christ's righteousness is our righteousness and that His life sustains us spiritually. In Colossians 1:27, Paul speaks of 'Christ in you, the hope of glory,' indicating that our hope for eternal life and sanctification is rooted entirely in Christ's indwelling presence.