Q: Then what am I?
M: It is enough to know what you are not. You need not know what you are. For, as long as knowledge means description in terms of what is already known, perceptual, or conceptual, there can be no such thing as self-knowledge, for what you are cannot be described, except as total negation. All you can say is: ‘I am not this, I am not that’. You cannot meaningfully say ‘this is what I am’. It just makes no sense. What you can point out as ‘this’ or ‘that’ cannot be yourself. Surely, you can not be ‘something’ else. You are nothing perceivable, or imaginable.
Nisargadatta, M., I AM THAT, Ch.1