8 Bible Verses about Division Among Christians

Some men came down from Judea and began teaching the brothers, “Unless you are circumcised in accordance with the custom of Moses, you cannot be saved.” Paul and Barnabas disagreed greatly and debated with them, so it was determined that Paul and Barnabas and some of the others from their group would go up to Jerusalem to the apostles and the elders [and confer with them] concerning this issue. So, after being supplied and sent on their way by the church, they went through both Phoenicia and Samaria telling in detail the conversion of the Gentiles, and they brought great joy to all the believers. read more.
When they arrived in Jerusalem, they were received warmly by the church and the apostles and the elders, and they reported to them all the things that God had accomplished through them. But some from the sect of the Pharisees who had believed [in Jesus as the Messiah] stood up and said, “It is necessary to circumcise the Gentile converts and to direct them to observe the Law of Moses.”

I urge you, brothers and sisters, to keep your eyes on those who cause dissensions and create obstacles or introduce temptations [for others] to commit sin, [acting in ways] contrary to the doctrine which you have learned. Turn away from them.

But I urge you, believers, by the name of our Lord Jesus Christ, that all of you be in full agreement in what you say, and that there be no divisions or factions among you, but that you be perfectly united in your way of thinking and in your judgment [about matters of the faith]. For I have been informed about you, my brothers and sisters, by those of Chloe’s household, that there are quarrels and factions among you. Now I mean this, that each one of you says, “I am [a disciple] of Paul,” or “I am [a disciple] of Apollos,” or “I am [a disciple] of Cephas (Peter),” or “I am [a disciple] of Christ.” read more.
Has Christ been divided [into different parts]? Was Paul crucified for you? Or were you baptized into the name of Paul? [Certainly not!]

You are still worldly [controlled by ordinary impulses, the sinful capacity]. For as long as there is jealousy and strife and discord among you, are you not unspiritual, and are you not walking like ordinary men [unchanged by faith]?

Does any one of you, when he has a complaint (civil dispute) with another [believer], dare to go to law before unrighteous men (non-believers) instead of [placing the issue] before the saints (God’s people)?

For, in the first place, when you meet together in church, I hear that there are divisions among you; and in part I believe it,

Look out for the dogs [the Judaizers, the legalists], look out for the troublemakers, look out for the false circumcision [those who claim circumcision is necessary for salvation];

They went out from us [seeming at first to be Christians], but they were not really of us [because they were not truly born again and spiritually transformed]; for if they had been of us, they would have remained with us; but they went out [teaching false doctrine], so that it would be clearly shown that none of them are of us.