What does the Bible say about spiritual union with Christ?

The spiritual union between Christ and His people is a profound truth emphasized in Scripture, particularly in Ephesians 5:25-33. This passage illustrates that just as a husband should love his wife as Christ loves the church, so believers experience a mystical union where they are members of Christ's body. This mystery reveals the depth of the relationship, where believers are not only loved by Christ but are also transformed and sanctified through Him. The essence of this union is that through Christ, believers participate in His death and resurrection (Ephesians 2:4-6), affirming that their spiritual lives are intertwined with His.