James 3:1 (NIV) Not many of you should presume to be teachers, my brothers, because you know that we who teach will be judged more strictly.
So you want to be a pastor or teacher?
Okay. One word of advice - be sure sure you are called. You'll have to be called just to survive the opposition from people. Then in the end God will judge you for every single thing you have ever taught.
Just remember the LESSON of the WHALE: When you get to the top and are ready to blow is when you get harpooned!