Christ instituted only one Church, the Catholic Church, the communion of churches which accepts the supreme leadership of Pope, the successor of Peter. It was Jesus' wish and prayer that there may be only a single flock and one shepherd (Jn. 10:16)b. He prayed for the unity of the believers (Jn. 17:21) and gave the unique commandment of love. Our love for one another is the symbol of our discipleship (Jn. 13:34-35), and Jesus' sonship (17:23). As there is only one God, the Father, one Lord, Jesus Christ, one hope, the Holy Spirit there is only one Church, one faith and one baptism (Cf. Eph. 4:2-6). Though there are different gifts, there is only one spirit (1 Cor. 12:4-6), though there are many members, there is only one body (V 27), that is the Church (Eph. 5:30). Christ is the same today, yesterday and tomorrow, Christ cannot be divided (1 Cor. 1:13) so also his body, the Church. No groupism is to be encouraged in the Church (Cf. 1 Cor 1:10-16).
In spite of all these teachings on unity and oneness of the church, so many groups preach division. They may have zeal, but are ignorant of God's righteousness (Rom. 10:2-4). As Paul says, "such are false apostles, deceitful workers, transforming themselves into apostles of Christ" (2 Cor.11: 13). Even Satan transforms himself into an angel, If so, his ministers also could pretend to be ministers of righteousness (VV 14-15). It is a pity that some preach Christ from envy and strife, from selfish ambition and insincerity (Phil. 1:15-17). Let us be cautious of such groups and yet be glad that Christ is preached though in pretence (V 18).