What does the Bible say about vital union?

Vital union refers to the profound relationship established by God between Himself and His chosen people. In John 17, Jesus prays for this unity, indicating that the relationship is not merely a physical or social one but a deep spiritual connection. This union is vital for life, as it enables believers to share in the life of Christ, manifested in faith, unity, and purpose. The unity of the Godhead—Father, Son, and Holy Spirit—is the foundation upon which this vital union is built, as they are one in essence and purpose, working together for the salvation of God's people.