The verse begins with a command. It has a military note and in the Greek, it is something that must be obeyed.
Look today, look at the internet. You have got hundreds of self-appointed people setting up as teachers their own websites, their own sources of instruction and information. Nobody ever thought they were suitable, they were never appointed by a church which is the rule of the Scripture, they were never properly set up for this or prepared for this. No, they thought well of themselves. They appointed themselves. And some of them are very famous, some of them have hundreds of thousands of viewers and listeners and people love them, and people do not say – but who appointed that? And very often a woman too, which the Scripture says no women as teachers.