Mc 9:35-37
Then he sat down, called the Twelve, and said to them, "If anyone wishes to be first, he shall be the last of all and the servant of all." Taking a child he placed it in their midst, and putting his arms around it he said to them, "Whoever receives one child such as this in my name, receives me; and whoever receives me, receives not me but the one who sent me.".
