Knowledge of Cars or God's Word

On a Saturday morning radio talk show in the Seattle area, people phoned in to speak with an auto mechanic. It seemed like he had answers for questions about every car — Chevy, Ford, Toyota, Oldsmobile, Chrysler, and Buick. I was ashamed, wondering if I could answer questions with as much assurance and knowledge about the Word of God, doctrine, the nations of God’s world, and missions?