Mark 9:39

Verse 39. Forbid him not. Do not prevent his doing good. If he can work a miracle in my name, it is sufficient proof of attachment to me, and he should not be prevented. Can lightly speak evil of me. The word here rendered lightly, means quickly, or immediately. The meaning of the passage is, that he to whom God gave the power of working a miracle, by that gave evidence that he could not soon be found among the enemies of Jesus. He ought not, therefore, to be prevented from doing it. There is no reason to think, here, that John had any improper designs in opposing the man. He thought that it was evidence that he could not be right, because he did not Join them and follow the Saviour.