But while they were all marveling at everything he was doing, Jesus said to his disciples, “Let these words sink into your ears: The Son of Man is about to be delivered into the hands of men.” But they did not understand this saying, and it was concealed from them, so that they might not perceive it. And they were afraid to ask him about this saying.

An argument arose among them as to which of them was the greatest. But Jesus, knowing the reasoning of their hearts, took a child and put him by his side and said to them, “Whoever receives this child in my name receives me, and whoever receives me receives him who sent me. For he who is least among you all is the one who is great.”

John answered, “Master, we saw someone casting out demons in your name, and we tried to stop him, because he does not follow with us.” But Jesus said to him, “Do not stop him, for the one who is not against you is for you.”

(Luke 9.43b-50)