I think what I have yet to come even close to understanding is the concept of thought. What is it that makes us think one thing and someone else something else. Even if you two are looking at the same thing or working on the same issue. I know the brain plays a part. That is too simple an answer. How does it play a part? It has yet to be explained by our modern science. Google it, the answer is not out there yet. So that is mine, what confuses you?