James 3: 1
Again addressing my brothers, a sign that a new topic is being considered, James suggested moderation and restraint in the multiplication of teachers. Obviously too many of the new Jewish Christians aspired to teach and thereby carry some of the rank and admiration given to Rabbis. It is doubtful that the reference here is to official teachers of the apostolic or prophetic status. These are the unofficial teachers (didaskaloi) in the synagogue meetings of the church family where much latitude was given for even strangers to speak. Paul frequently used this courtesy given visitors. James’ complaint was simply that too many believers were overly anxious to speak up and show off (cf. John 3:10; 9:40–41). Teaching has to be done, but those who teach must understand their responsibility, as those who teach will be judged more strictly. A teacher’s condemnation is greater because, having professed to have a clear knowledge of duty, he is all the more bound to obey it.
Blue, J. R. (1985). James. In J. F. Walvoord & R. B. Zuck (Eds.), The Bible Knowledge Commentary: An Exposition of the Scriptures (Vol. 2, p. 827). Wheaton, IL: Victor Books.