The Theology Tree is how we show that Christ is at the center of all learning, he is the trunk that feeds the branches of all other subjects and learning. The roots represent the correct principles of the gospel or the Plan of Happiness. President Packer said we are to teach our children the Plan of Happiness so our children "can thereafter locate themselves in respect to the plan." Knowing the Plan can give them an answer to their "why?" questions. He goes on to say that "providing [our children] with a collection of unrelated truths will hurt as much as it helps." We can "provide a basic feeling for the whole plan, even with just a few details, and it will help them ever so much more. Let them know what it's all about, then they will have the "why."