Commentaries:
Barnes' Notes
We saw one ... - There is no improbability in supposing that this might have been one of the disciples of John, or one of the seventy whom Jesus had sent out, and who, though he did not "personally" attend on Jesus, yet had the power of working miracles. There is no evidence that he was merely an "exorcist," or that he used the name of Jesus merely as a pretence.
Other Barnes' Notes entries containing Mark 9:38:
Numbers 11:4-35
Matthew 17:16
Matthew 18:1-6
Matthew 18:1-6
Mark 9:42-50
Luke 9:46-50
John 3:26
DISCLAIMER: Church of the Great God (CGG) provides these resources to aid the individual in studying the Bible. However, it is up to the individual to "prove all things, and hold fast to that which is good" (I Thessalonians 5:21). The content of these resources does not necessarily reflect the views of CGG. They are provided for information purposes only.