Piper weighs in on why doctrine is so important. My favorite comment:
Discernment is not created in God’s people by brokenness, humility, reverence, and repentance. It is created by biblical truth and the application of truth by the power of the Holy Spirit to our hearts and minds. When that happens, then the brokenness, humility, reverence, and repentance will have the strong fiber of the full counsel of God in them.