At first, self-inquiry is just that: IN-quiry. It is a turning of attention and curiosity inwards towards yourself and towards the truth of your nature. It is a practice of redirecting attention away from outward objects, events, and experiences and towards the experiences within your body and being, including subtle experiences within awareness itself. Eventually this inward focus can lead to an experience of your ultimate true nature and even beyond experience itself to a dimension that is empty of any experience or sense of self. Even that is just another level that can open up into deeper and deeper realities that are beyond description.