If you're able to watch the mind, then you are not the mind. How many minds do you have? Are you the mind, or are you the observer watching the mind? Only one of them is real. Just like the heart or lungs, the ego/mind is going and going all by itself. In other words, you are not the thinker of thoughts. Take 5 minutes to watch the mind and see for yourself. You can't control it. You can't stop it by controlling it, but you can stop it by watching it and losing interest in it. You are not the body and it's senses. You are not the mind and it's thoughts. You are the infintely silent Awareness that is aware of them. One is not subject to the countless faulty workings of the ego/mind when one stops identifying the automatic random repetitive thoughts of the mind as being "me". The very nature of the ego/mind can be summed up in one word... DRAMA. And what is drama? It's the absence of peace (of mind).
"Every phenomena that exists is a creation of thought; therefore I need but empty my mind to discover that all of them are void." - Huang Po, Zen Master