I did not have a sensation of pain now to look at. I am looking at fear, which is a constant companion :-).Is the sensation labelled "I" any different to the sensation labelled 'pain'? Look at this very carefully.
"I" was trying to see how the sensation "I" appears compared to the sensation of "fear".
The sensation of "I" as i mentioned before is a base sensation which is labeled as "I" sensation by the thought (this much more prevalent than other sensations).
Before you mentioned "The sense of I", I even did not think of the sensation as "sense of I", even though this was present without any name and without thought associating the sensation with that. so I can see that thought now after learning the word, instantaneously translate that sensation to the "sense of I".
The sensation of fear can be described from a thought perspective commonly expressed as "butterflies in the stomach" or "heart sinking" or "Heart in my throat" sensation etc.
I tried to look at them, initially, it looked like the sensation of fear is attached to the sensation of "I" in the sense that the sensation of "I" is present when the fear sensation is present. but later I see instances where these sensations are not related and see as different sensations.
when "I" reflect on the word "I", or when "I," think that "I" am thinking. then a base sensation is present. There is nothing in it to associate it with me except this sensation is known throughout and prevalent. the "fear" sensation feels more like a sensation arising from "stomach" or "heart", even though there is actually no "heart" or "stomach". even though these sensations have nothing inherent to suggest that it is "me" or "fear", somehow the "fear" sensation seems to occur distinctively from a place in the body (such as stomach, heart etc). I do not see how thought associates these sensations with parts of body (even though parts of body does not exist in actual seeing).