How do we know the doctrine of fellowship is true?

The doctrine of fellowship is rooted in the teachings of the New Testament, particularly in the writings of the Apostle Paul. He emphasizes that believers are called into one body and one Spirit (Ephesians 4:4-6). Paul articulates that this fellowship stems from God's work through Christ, uniting diverse individuals into one family, as seen in 1 Corinthians 1:9, which affirms that God calls us into the fellowship of His Son. This unity transcends earthly divisions; it is grounded in our shared identity as redeemed sinners and members of Christ's body. As believers, our fellowship is maintained by grace, not by human effort, allowing us to honor and prefer one another as equal recipients of God's mercy.