The most mysterious motion man is capable of, is thinking. This is done by the mind. The mind is an activity of the brain. How it works is beyond us, we just don't know. That great mystery magician, Sir Arthur Conan Doyle tells us, "Don't think about it, stock up your brain attic with furniture where you can get at it when you need it." Isn't that elementary my dear Watson? When we tick, what makes us tick?