How do we know the importance of Christian unity?

In John 17:21, Jesus prays for the unity of all believers, reflecting God’s desire for His people to be one as He and the Father are one. This unity is not merely organizational but is rooted in shared faith and love in Christ. The importance of this unity cannot be overstated; it serves as a powerful testimony to the world of the truth of the Gospel. Division amongst Christians is seen as a disservice to the Church and a stumbling block to others seeking the truth. Hence, fostering unity should be a primary focus for believers, reflecting the love and oneness that Christ exemplified.