When you are simply observing your breath, you are perceiving an automatically unfolding process in your body. By contrast, when you are observing your wandering mind, you are also experiencing the spontaneous activity of a process in your body.
Thomas MetzingerYou cannot be a rational subject without veto-control on the level of mental action.
Thomas MetzingerIf we lose the ability in question for a single moment only, we are immediately being hijacked by an aggressive little "Think me!" and our mind begins to wander.
Thomas Metzinger