He's Not Against Us

    John said to him, “Teacher, we saw someone casting out demons in your name, and we tried to stop him, because he was not following us.” But Jesus said, “Do not stop him, for no one who does a mighty work in my name will be able soon afterward to speak evil of me. For the one who is not against us is for us. For truly, I say to you, whoever gives you a cup of water to drink because you belong to Christ will by no means lose his reward.
    (Mark 9:38-41 ESV)

On this passage J.C. Ryle wrote

J.C. Ryle

Here is a golden rule indeed, and one that human nature severely needs, and has too often forgotten. Men of all branches of Christ's Church are apt to think that no good can be done in the world, unless it is done by their own party and denomination. They are so narrow-minded, that they cannot conceive the possibility of working on any other pattern but that which they follow. They make an idol of their own peculiar ecclesiastical machinery, and can see no merit in any other. They are like him who cried when Eldad and Medad prophesied in the camp, "Moses, my master, make them stop!" (Num. 11:28.)             

To this intolerant spirit we owe some of the blackest pages of Church history. Christians have repeatedly persecuted Christians for no better reason than that which is here given by John. They have practically proclaimed to their brethren, "you shall either follow us, or not work for Christ at all."             

Let us be on our guard against this feeling. It is only too near the surface of all our hearts. Let us study to realize that liberal, tolerant spirit which Jesus here recommends, and be thankful for good works wheresoever and by whoever done. Let us beware of the slightest inclination to stop and check others, merely because they do not choose to adopt our plans, or work by our side. We may think our fellow Christians mistaken in some points. We may fancy that more would be done for Christ, if they would join us, and if all worked in the same way. We may see many evils arising from religious dissensions and divisions. But all this must not prevent us rejoicing if the works of the devil are destroyed and souls are saved.             

Ryle, J.C.  (2011-07-12). Expository Thoughts on the Gospels: The Four Volume Set [Fully Linked and Optimized] (Kindle Locations 7836-7849). Primediaelaunch eLaunch. Kindle Edition.