What does the Bible say about spiritual union?

The concept of spiritual union in the Bible, particularly emphasized in Ephesians 5, illustrates the mystical bond between Christ and His church. This union signifies that believers are not merely adherents to a faith but are incorporated into the very life of Jesus Christ. Paul likens this relationship to that of a husband and wife, where two become one, highlighting the profound nature of our connection with Christ as members of His body. Arthur Pink notes this spiritual union as one of the most important and blessed truths found in Scripture, emphasizing its significance for all believers.