In the seventeenth episode of "Defenses Against Deception," Duane teaches the importance of understanding the simplicity of Jesus as a defense against deception. He emphasizes that the Bible and scriptures should always lead us to Jesus. Studying the Bible without focusing on its author and subject, Jesus is like memorizing a restaurant menu without ordering a meal. 

People often focus solely on the literal interpretation of the word, missing the spiritual and life-giving aspects found in Jesus. This can lead to legalism, unkindness, and deception by not allowing the word to lead them to intimacy with Christ. Doctrines and traditions should guide us to Jesus.

Only by keeping a simple focus on Jesus can we avoid being led astray. Believers should have a child-like, simple faith centered on Jesus as the living Word. Doctrines, traditions, and even the Scriptures themselves are meant to continually guide us to the person of Christ and abiding in Him, our sure defense against deception.