But in giving this instruction, I do not praise you, because you come together not for the better but for the worse. 18 For, in the first place, when you come together as a church, I hear that divisions exist among you; and in part I believe it. (I Corinthians 10:17-18 NIV)
The church is supposed to exist as one, but there are often trouble makers in the church who seek to undermine church unity. These people cause divisions to exist when believers come together as a church. Church gatherings are supposed to showcase fellowship and unity, but often they display the opposite. Sadly, some people come to church simply to fight and argue with other believers. They treat each other with anger and contempt instead of love and humility.
The kinds of divisions that Paul is talking about here specifically are financial and social divisions. The church meetings in Corinth were conducted in such a way as to emphasis the differences between the various casts of society. Everyone brought their own food when they had a public meal at church, and none of the wealthy shared with those who were poor and starving. Thus the meal–which was supposed display the unity of the church–only served to manifest it’s divisions. Christians are supposed to care for, submit to, and take care of each other. If your church meetings display divisions rather than unity, then you are bringing dishonor to God.