What does it mean that Christ is in all believers?

When Scripture states that 'Christ is in all' believers, it signifies His indwelling presence within them, which transforms their inner life. Paul articulates this concept when he states, 'Christ in you, the hope of glory' (Colossians 1:27). This means that not only is Christ our salvation, but He also actively influences our thoughts, affections, and actions. His presence makes believers spiritually alive, providing the means by which they bear fruit and reflect His character in their lives. Furthermore, the reality of Christ indwelling believers assures them of their salvation, grants them access to all the richness of His grace, and motivates them towards a life reflecting His glory and righteousness.