(2 Timothy 2:2 – ESV)
Not many of you should become teachers, my brothers…(James 3:1). Just because you have the ability to teach (impart and communicate information in an understandable way) does not mean you automatically have correct doctrine. You may know how to teach, but WHAT are you teaching? Just because you can teach in some certain areas doesn’t qualify you to teach the Bible. It certainly helps to be able to teach, but WHAT is taught is the primary necessity. A great communicator of heresy is still deadly, and even more so than someone who teaches falsity but isn’t captivating, memorable, or engaging.
This is why one of the primary skills a good biblical teacher needs is the ability to discern. If that is a problem, then you have a problem. Perhaps you ought to teach, once you have gone back and learned the curriculum. You shouldn’t be looking to teach new things, and some of the old things you know so well and have taught so long are not truth. You may know how to guide studies but you might lead down the wrong path.
It is not simply that you can teach, and how well you teach, it is about what you teach. For the most part, you only teach what you know. You impart knowledge and help discipline to develop skill and wisdom, but if you are going in the wrong direction you do more harm than good. If you want to teach, you had better learn.