How do we know God's promises of unity are true?

The assurance of God's promises regarding unity comes from the sacrificial act of Christ and the work of the Holy Spirit within believers. As noted in Romans 8:14-17, we are led by the Spirit as children of God, adopting us into His family. This divine adoption underscores the unity we all share as brethren in Christ. Furthermore, Hebrews 2:10-11 reminds us that Jesus, our elder brother, unites Himself with those He saves, demonstrating His commitment to this unity. The indwelling of the Holy Spirit also actively binds the heart of each believer, providing personal assurance that God's promises for unity are not only true but vividly alive in the life of the church.