I am aware of my weakness in expressing myself, but I think I can come crystal clear with this post.
We are sinners, and as such we have various levels of evil. With words used in scripture, it is the sick that needs healing. That is the purpose of the church, and the principles of truth, to administer truth as good medicine. We can overcome evil. We do not understand things as they really are until we depart from evil. (Job 28:28) And since we are evil, then we lack understanding at various levels. Since we lack understanding, then we will have difference of opinions. It is a natural phenomenon for those who come to Christ and His Church, for the purpose to be cleansed from evil, to not see eye to eye with the others, because they have only started the process of departing from evil.
To have difference of opinion is not to be divided, but to be expected. But to divide up the hospital (the church) because of disagreement as to what medicine is correct (truth), is what I see as the focus when Paul said: Now I beseech you, brethren, by the name of our Lord Jesus Christ, that ye all speak the same thing, and that there be no divisions among you; but that ye be perfectly joined together in the same mind and in the same judgment.
(New Testament | 1 Corinthians1:10)
He went on to warn them about the contentions. I have never seen a serious contention over our difference of opinions. Yet I see that contention is vastly out of control in many divisions that still occur among Christian congregations. It is often in the paper.
Paul said "...be perfectly joined together in the same mind and in the same judgment."
That cannot happen until we hear the same Spirit, and that will not happen until we depart from evil, one step at a time.