Now I exhort you, brethren, by the name of our Lord Jesus Christ, that you all agree and that there be no divisions among you, but that you be made complete in the same mind and in the same judgment.I was always taught that this passage spoke against denominationalism. Specifically, it stood as a warning against believing and preaching different doctrines. It was used similarly to Galatians 1 which is a warning against preaching a different gospel.
11 For I have been informed concerning you, my brethren, by Chloe’s people, that there are quarrels among you.
12 Now I mean this, that each one of you is saying, “I am of Paul,” and “I of Apollos,” and “I of Cephas,” and “I of Christ.”
13 Has Christ been divided? Paul was not crucified for you, was he? Or were you baptized in the name of Paul? (1 Corinthians 1:10-13)
But is this what this text is addressing?
Was the church at Corinth expected to be uniform in their beliefs?
We mustn’t confuse unity with uniformity.
Concerning knowledge, Paul warned:
Now concerning things sacrificed to idols, we know that we all have knowledge. Knowledge makes arrogant, but love edifies.He went onto explain what he meant: there were some at Corinth who came from a polytheistic background. They had yet to grasp the concept of there only being one God. “Not all men have this knowledge” (1 Corinthians 8:7). They were similar to many in Israel’s history who believed in multiple gods but only worshiped one (monolatry).
2 If anyone supposes that he knows anything, he has not yet known as he ought to know;
3 but if anyone loves God, he is known by Him. (1 Corinthians 8:1-3).
So, what did Paul mean by his encouragement that they all speak the same thing? It’s found in the next passage as quoted above: they needed to see that they were equal because they were all of Christ. The person that taught them the gospel didn’t matter; their allegiance to Christ did.
We may have different beliefs and hold to different doctrines. But instead of causing divisions by saying “I’m of Calvin” or “I’m of Arminian” or “I’m of Campbell” we should unite by speaking the same thing: “I’m of Christ.”