Where can this entity be found? Is it in the neuron? The cell? The nerve? The atom? The blood? The bone? Is there some "one" located in this body? Are you in the mind? Do you have a mind? Do you use a mind? Are you in the head? Are you in the middle of the head? Behind the eyes? Between the ears? In the left lobe? The right?
If we cannot scientifically locate the individual in the brain, even though we can zoom down into the subatomic level, then where exactly is it located?
There is a presence - you are there. You are confident about that, as you should be. You know you exist. That cannot be denied. However to tie that existence into some entity abiding in the brain or head is complete mythology, no different from some God which lives in the sky. There is no entity there.
We get confused when we hear that - it makes sense but then we say "yet I'm here!" Yes - but can we disconnect the obviousness of present existence/awareness with the mythology of individuality? Can we lay aside this idea for a bit, detach completely from it so that a genuine inquiry can be made into what you might be? In the absence of some individual entity, yet in the obviousness of aware presence, we might intuit that there is an intelligence present, that which we call Life, THAT which is presently aware.
The leap is truly that short - THAT which truly IS - that singular existence or essence - THAT is presently aware - if we speak of a body-mind organism, of Consciousness, then we can say that Life is aware because of that mechanism, because of that capacity called Consciousness.
The obvious begins to sort of open up - what-I-AM is THAT which IS, that existence - that essence. Life, if we must give it a name. This realization dissolves the myths I have about myself and the obvious becomes obvious. I didn't have to do anything to BE that. I already AM that, only the idea that I am an individual precludes the obvious truth that I am Life itself.
So THAT which you know as "I", that which is always present and aware, THAT is not a mythical person but Life itself, aware of itself. Realization is simply the falling away of the false. The true isn't added or changed but only realized.