Lesson 4: The Words of Eternal Life. How do you respond when you come across passages in Scripture that are difficult to understand? Are those passages to be swept to the side, despairing that we can never understand them? In John 6, we find the disciples having a conversation with Jesus after some difficult-to-understand teaching. In this lesson, Dr. Thomas explains how the disciples responded to Jesus and His difficult teaching and how Jesus handled the disciples’ grumbling.