How do we understand the idea of the 'self'?
I like to think of
my self as that within my body (whatever the self is, it is inside my body, I think) which is aware of (1) my physical limits/boundaries (my body) AND (2) the change detected by my senses.
Thus, my self knows what I am NOT (i.e., it is capable of differentiating between my body and what is not my body - or between itself and what is NOT itself, even if it is unable to exactly define itself); in addition, my self is also able to relate a sense-experience (a perception) to past forms of such sense-experience (it is aware of change).
Sometimes, I try to approach the problem of the self by asking myself what it is that I am aware of. So far, I have been able to conclude that the most basic things (or least complex things) I am aware of are my body and the change in the environment perceived by my sensory organs; in a way, I think of these (my body and change) as the basis of awareness (I don't think one would be able to be aware if one could not tell itself apart from the environment, and if one could not perceive
change in the environment). In regard to the perception of change, I do not think that the act of perceiving (in addition to being able to tell what one is not) would be enough to give rise to the self - one would need to be able to detect change. Thus, at its most "basic" level*, I think, the self is that which is able to be aware of change in its environment (sensory organs detect/react to change in the environment but are not aware of it; the self does not detect change in the environment but is aware of it - but to be aware of such change, the self must be aware of what it is not, first).
So, what is it that you are NOT? What is it you are aware of (in its most basic form)?
* Well, in its most basic form, the self is that which is aware (but again, to be aware, I think one must be able to know/understand what one is not - and by one I mean an organism/a particular entity).