What does it mean to be joined to Christ?

The concept of being joined to Christ reflects a profound and eternal union with Him, which is foundational to the faith of believers. In the sermon, this union is portrayed as unbreakable, drawing from the illustration of Jacob's marriage that symbolizes Christ's relationship with His church. This union is not based on fluctuating feelings or works but is anchored in the sovereign grace of God. As Philippians 1:6 states, 'He who began a good work in you will carry it on to completion until the day of Christ Jesus.' The assurance that believers cannot lose their salvation derives from the fact that their union with Christ is established by God's unchanging purpose and love, which guarantees that all whom He has chosen will be preserved in faith until the end.