"I am afraid that when I come I may not find you as I want you to be, and you may not find me as you want me to be. I fear that there may be discord, jealousy, fits of rage, selfish ambition, slander, gossip, arrogance and disorder. I am afraid that when I come again my God will humble me before you, and I will be grieved overmany who have sinned earlier and have not repented of the impurity, sin and debauchery(in which they have indulged" (2 Corinthians 12:20-21).
"Brothers and sisters, rejoice! Strive for full restoration, encourage one another, be of one mind, live in peace. And the God of love and peace will be with you.
Greet one another with a holy kiss. All God’s people here send their greetings.
May the grace of the Lord Jesus Christ, and the love of God, and the fellowship of the Holy Spirit be with you all" (2 Corinthians 13:11-14).
Oh, I wanted to say that Christians have to tame their aggression against each other by love and peace. And this peace was blessed by the Apostles, and it is what allows to get along with each other.
There also was a quote by Paul the apostle who said:
My brothers and sisters, some from Chloe’s household have informed me that there are quarrels among you. What I mean is this: One of you says, “I follow Paul”; another, “I follow Apollos”; another, “I follow Cephas”; still another, “I follow Christ.”