When we start looking for who we really are, we start looking where we know to look. We actually start looking in the areas we know. What we don't realize, is that we are looking in boxed sets of assumptions, unquestioned opinions, looking through beliefs, looking via religions, philosophy, psychology, etc.
But the answer is not there! The answer is closer than that! Closer than your body. Closer than your mind. That is why so much looking goes nowhere. The answer is not where we are looking, and we don't realize that we don't know where to look.
Without help we are likely to have to plow through all the religions, all the philosophies, all the psychologies, and exhaust them all, before we even get a hint that we are looking in the wrong place.
This is why it is often stated that you need a teacher, a guide. Because, if the teacher knows, the teacher can keep pointing out that you need to look closer, that the answer is closer than all those beliefs, closer than all your assumptions, and outside the boxes in your mind.
The simplest thing is to look at what is subject, and what is object. Investigate if an object is really "out there," and you "in here."
Remember that the only proof of "out there" is your own self. Everything you see "out there" is sensed by you, interpreted by your body and your mind. That interpretation is all done in YOU. So where does that object actually exist? ONLY IN YOU!
And when you see this, you see that there is NO "out there." There is only here. And when you look at your own body, and your own mind, you see that even yourself is an interpretation of the senses, interpretations of the mind. And if you follow this to the conclusion, you can only deduce that what you are, and what everything is, is SUBJECT only.
If subject only exists. Then YOU are THAT. When you see it, it is very simple. It changes your perspective, you no longer see anything "out there." All is SUBJECT only. All is only now, always and forever, and only as it is. And you are THAT.