So I just had an interesting experience I'm not sure if is legitimate. But I'm going to share it.
on page 100 of this book Harris suggests sitting for 60 seconds and just being aware without thinking. I did this, and I tried it several times. My latest attempt I was sitting here with my eyes closed just being aware. I heard birds and thought "birds" and and let the thought go by without addressing it. The same happened with vehicles on the road, music I heard next door. And then it hit me all at once that absolutely NONE of these thoughts were mine. They were as involuntary as breathing. They are not what makes me conscious.
In the moment of this realization I experienced this feeling of not being a self, which is exactly what he states the point is. It startled me out of trying to meditate it was so severe (though brief). It left me with the experience and realization that thinking does not define being. In challenging the famous line, "I think therefore I am" I feel after this experience that this is completely false. Our thoughts, ALL of them, originate with entirely involuntary ideas. I.e., you see the garbage can full and it triggers the thought that it must go out. The thought is completely involuntary. The subsequent decision of whether to take it out or ignore it is another matter, but the mere act of thinking says nothing in terms of being because thoughts are not voluntary - they do not come about by choice.
as I said, I am unsure of the legitimacy of this experience. This is because it is only my 8th attempt or so at meditation. But it feels very significant to me. It was sort of frightening tbh, but in a sort of fashion I imagine skydiving to be.