1 Corinthians 1:9

The fellowship of his Son] i.e. union with Him. This is the keynote of the Epistle, and leads to the thought suggested in the next paragraph, that they who are united to Christ should be united to one another.

(a) 1 Corinthians 1:10 to 1 Corinthians 4:21. Parties and Party Spirit in the Church

10-17. Paraphrase. 'Brethren, I implore you by the Holy Name of Jesus to abstain from strife and party spirit. I have heard of your disputes and of your use of the names of Apostles and even of Christ's Holy Name as party watchwords. (13-16) Can Christ be claimed as the property of a faction! And are you putting my name on a level with His Sacred Name? I am thankful that I baptised so very few of you that none can say I baptised in my own name. (17) Preaching was my work, not baptism—the preaching of salvation through the Cross of Christ.'