I don’t believe the passage means what you think it means.
It does not mean we all must think, talk and walk the same.
Christians are gifted differently and each of us complements the body of Christ.
A variety of versions aids believers of different backgrounds to understand God’s word.
Rob
The problem was not solved by letter #1. It took another letter and a reprimand from the great apostle not long after. Why? Because they were following false apostles who challenged Paul's credentials from God.
I will give some verses without context.
Paul, an apostle of Jesus Christ by the will of God
2 Corinthians 11:5
For I suppose I was not a whit behind the very chiefest apostles.
2 Corinthians 12:11
I am become a fool in glorying; ye have compelled me: for I ought to have been commended of you: for in nothing am I behind the very chiefest apostles, though I be nothing.
2 Corinthians 12:12
Truly the signs of an apostle were wrought among you in all patience, in signs, and wonders, and mighty deeds.
2 Corinthians 10:10
For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.
Who are the they? The false apostles who have their ear.
2 Cor 11:13 For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.
14 And no marvel; for Satan himself is transformed into an angel of light.
15 Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works
2 Cor 10:7 Do ye look on things after the outward appearance? if any man trust to himself that he is Christ's, let him of himself think this again, that, as he is Christ's, even so are we Christ's.
8 For though I should boast somewhat more of our authority, which the Lord hath given us for edification, and not for your destruction, I should not be ashamed:
9 That I may not seem as if I would terrify you by letters.
10 For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.
11 Let such an one think this, that, such as we are in word by letters when we are absent, such will we be also in deed when we are present.
2 Cor 11:13 For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.
14 And no marvel; for Satan himself is transformed into an angel of light.
15 Therefore it is no great thing if his ministers also be transformed as the ministers of righteousness; whose end shall be according to their works.
The same warfare is going on today with modern versions and the authority of the apostle Paul is still being challenged. His counsel to us is the same as it was to the Corinthians.
2 Cor 13:3 Since ye seek a proof of Christ speaking in me, which to you-ward is not weak, but is mighty in you.
4 For though he was crucified through weakness, yet he liveth by the power of God. For we also are weak in him, but we shall live with him by the power of God toward you.
5 Examine yourselves, whether ye be in the faith; prove your own selves. Know ye not your own selves, how that Jesus Christ is in you, except ye be reprobates?
The problems never change they are just presented differently. The same counsel is to us as was to the Corinthians and by the same man.