Why is the spiritual union with Christ important for Christians?

The spiritual union with Christ is one of the most profound truths in the Christian faith. This union signifies that believers are incorporated into the body of Christ, as illustrated in Ephesians 5, where it states that we are members of His body. This relationship is not merely symbolic; it carries significant implications for our identity and security as Christians. For example, in John 17, Jesus speaks of believers being in Him and He in them, which highlights the intimate nature of our relationship with our Savior. It assures us of our position in Him and His continual presence within us, shaping our lives and guiding us in righteousness.