'Divisions' in the Bible

Now I entreat you, brethren, in the name of our Lord Jesus Christ, to cultivate a spirit of harmony--all of you--and that there be no divisions among you, but rather a perfect union through your having one mind and one judgement.

for, in the first place, when you meet as a Church, there are divisions among you. This is what I am told, and I believe that there is some truth in it.