Before Jesus went to the Father, he preached that we (the believer) are unified through him. Just as there is one death, one burial, one resurrection, and one God, we should be one church. Division has always been around since the first church, but Paul addresses the issue that just because some follow Apollos and some follow Paul doesn't mean there should be division but only UNITY. Set aside the differences and ask yourself the real question, "who is Christ and what does he mean to you?"