Mark 9: 30 - 37
30 They went on from there and passed through Galilee. And he would not have any one know it;
31 for he was teaching his disciples, saying to them, "The Son of man will be delivered into the hands of men, and they will kill him; and when he is killed, after three days he will rise."
32 But they did not understand the saying, and they were afraid to ask him.
33 And they came to Caper'na-um; and when he was in the house he asked them, "What were you discussing on the way?"
34 But they were silent; for on the way they had discussed with one another who was the greatest.
35 And he sat down and called the twelve; and he said to them, "If any one would be first, he must be last of all and servant of all."
36 And he took a child, and put him in the midst of them; and taking him in his arms, he said to them,
37 "Whoever receives one such child in my name receives me; and whoever receives me, receives not me but him who sent me."

EWTN