30 And having gone forth thence, they were passing through Galilee, and he did not wish that any may know, 31 for he was teaching his disciples, and he said to them, 'The Son of Man is being delivered to the hands of men, and they shall kill him, and having been killed the third day he shall rise,' 32 but they were not understanding the saying, and they were afraid to question him.
33 And he came to Capernaum, and being in the house, he was questioning them, 'What were ye reasoning in the way among yourselves?' 34 and they were silent, for with one another they did reason in the way who is greater; 35 and having sat down he called the twelve, and he saith to them, 'If any doth will to be first, he shall be last of all, and minister of all.' 36 And having taken a child, he set him in the midst of them, and having taken him in his arms, said to them, 37 'Whoever may receive one of such children in my name, doth receive me, and whoever may receive me, doth not receive me, but Him who sent me.'
38 And John did answer him, saying, 'Teacher, we saw a certain one in thy name casting out demons, who doth not follow us, and we forbade him, because he doth not follow us.' 39 And Jesus said, 'Forbid him not, for there is no one who shall do a mighty work in my name, and shall be able readily to speak evil of me: 40 for he who is not against us is for us;
Matthew Henry's Commentary on Mark 9:30-40
Commentary on Mark 9:30-40
(Read Mark 9:30-40)
The time of Christ's suffering drew nigh. Had he been delivered into the hands of devils, and they had done this, it had not been so strange; but that men should thus shamefully treat the Son of man, who came to redeem and save them, is wonderful. Still observe that when Christ spake of his death, he always spake of his resurrection, which took the reproach of it from himself, and should have taken the grief of it from his disciples. Many remain ignorant because they are ashamed to inquire. Alas! that while the Saviour teaches so plainly the things which belong to his love and grace, men are so blinded that they understand not his sayings. We shall be called to account about our discourses, and to account for our disputes, especially about being greater than others. Those who are most humble and self-denying, most resemble Christ, and shall be most tenderly owned by him. This Jesus taught them by a sign; whoever shall receive one like this child, receives me. Many have been like the disciples, ready to silence men who have success in preaching to sinners repentance in Christ's name, because they follow not with them. Our Lord blamed the apostles, reminding them that he who wrought miracles in his name would not be likely to hurt his cause. If sinners are brought to repent, to believe in the Saviour, and to live sober, righteous, and godly lives, we then see that the Lord works by the preacher.