Do you give your car a tune-up every year? You check the oil, fluids, tires, and make sure that everything is working properly. If you don’t regularly tune up your car, eventually you will have to face the reality of seeing what is really going on with your vehicle. It might come from a “check engine” light or a breakdown by the side of the road. 6. The discussion of heresy might seem trivial or irrelevant to your life in the real world. You might affirm the doctrinal statement at church, but maybe you think or practice differently in everyday life. Heresies aren’t different religions but mutations of the Christian faith. They happen in the church. This discussion of heresy and doctrine is an important tune-up to help us know if we need to adjust our beliefs and practices to reflect the Jesus of the Bible.