John Nelson Darby
Two of the most influential theologians of the 19th-century were probably not men you would have felt comfortable with for any length of time. J.N. Darby and Arthur Pink each felt they had the corner on truth and had no use for anyone who didn’t hold their opinions and methods. It was a sad spectacle to see how each narrowed their circle and narrowed it again until almost no one remained in it. Darby, who had once been a leader in the Plymouth Brethren, formed his own small exclusive group of churches called Darbyites. Pink and his wife moved to an island to live alone, refusing association with any church at all, although issuing an influential teaching newsletter.
You have to realize that the men they were renouncing were of the caliber of George Mueller and D. L. Moody.
Contrast that with their Lord, who took a much broader view. When John told him “Master, we saw a man casting out devils in your name, and he does not follow us: and we forbade him, because he does not follow us.”
But Jesus said, “Don’t forbid him: for there is no man who will do a miracle in my name, that can lightly speak evil of me. For whoever is not against us is for us.”