As I was sitting at a restaurant, surrounded by conversations going on at nearby tables, it came into my thoughts how fascinating the brain and hearing work together. By this, I mean here are various conversations going on at one time, all equal in my ability to hear each one as well as the other. Yet, by my choice I can completely shut off from my hearing all conversations except the one I choose to hear, and in a split second shut off the one I was listening to and hear another conversation I had previously chose to shut off. Obviously this holds true to so many sounds we hear with our ears yet choose by our brain to hear what we select, as such with an orchestra. All instruments playing at the same time, all at the same pitch etc., yet by my choice I can choose to just hear the instrument I want to hear.