James 3:2 For we all stumble in many things. If anyone does not stumble in word, he is a perfect man, able also to bridle the whole body.
Continuing the passage regarding teachers, James reminds his audience (and us) that we all make mistakes. We all err. Note how his pronoun choice includes him. James isn’t perfected in the sense that he as incapable of sin; the “we” reminds us that he is in the same boat. The first step to teaching should be to acknowledge that we do not know everything. We teach others, are taught by others, and together grow in the word and our love for Jesus Christ. Love ought to be our motivation for teaching: a fervent love for God that translates into a love for our fellow saints and unsaved men.