The glory which thou hast given me I have given to them, that they may be one even as we are one, I in them thou in me, that they may become perfectly one, so that the world may know that thou hast sent me and hast loved them even as thou hast loved me. Unity is essential to the followers of Jesus. In other words, Christians should give themselves completely to each other just as do the Persons of the Trinity, who are themselves complete gift of self. The love among His disciples reveals their discipleship and finds its model in Christ in the total outpouring of His love on the cross. The Scandal of Divided Christianity Division among Christians strikes are the heart of the Gospel message and impedes the Church from manifesting Christ's love and therefore his divinity to the world.
Lack of unity is a serious obstacle to the witness of evangelization.
Division contradicts the truth of the Gospel, an essential element of which is the call to unity, so that non-believers who meet missionaries each preaching different versions of the Gospel will think it to be a source of division, despite its presentation as a way of love. At this point we wish to emphasize the sign of unity among all Christians as the way and instrument of evangelization. The division among Christians is a serious reality which impedes the very work of Christ. There are many contributing causes behind division, but in the end, we must blame the sins of us Christians. If we confess our sins, he is faithful and just, and will forgive our sins and cleanse us from all unrighteousness.