Why is sound, biblical doctrine so utterly necessary? Here are three brief reasons:
- It produces correct thinking about God, and all matters pertaining to life. I don't believe any doctrine is impractical. Some doctrines may be explicitly practical - like believing in Christ for salvation or not committing adultery - but all doctrines hold some practicality. All of our theology either explicitly or implicitly affects the way we live our lives.
- It produces pure love, a good conscience, and a sincere faith. In 1 Timothy 1:3-5, Paul is urging Timothy to charge men not to teach any different doctrine. Then, in verse five he says, "The aim of our charge is love that issues from a pure heart and a good conscience and a sincere faith." Therefore, this deduction can be made: one of the effects of teaching sound doctrine is the production of pure love, a good conscience, and a sincere faith in those who receive it.
- It produces maturity, and an attribute of maturity is discernment. The verse supporting this is quite self-explanatory, "And he gave the apostles, the prophets, the evangelists, the shepherds and teachers, to equip the saints for the work of ministry, for the building up of the body of Christ, until we all attain to the unity of the faith and of the knowledge of the Son of God, to mature manhood, to the measure of the stature of the fullness of Christ, so that we may no longer be children, tossed to and fro by the waves and carried about by every wind of doctrine, by human cunning, by craftiness in deceitful schemes. Rather, speaking the truth in love, we are to grow up in every way into him who is the head, in Christ..." (Ephesians 4:11-15)