Realized Sages such as Bhagavan Sri Ramana have indicated the experience or the state of the Self. It is what it is.
It is the Heart of Existence, and Existence It Self. Sri Ramana used to say that It is only Being.
You can call it what you like. Self, No-Self, Shunya, Reality. What difference can it make? The ultimate Reality cannot be named. It has no name. There is no one outside of Reality to give it a name.
Ancient sages taught that the core of our being is pure Sat-Chit-Ananda which roughly translates from Sanskrit as Existence, Knowledge/Consciousness, Bliss as One.
It is devoid of thought or doubt or conflict, but utterly complete and supreme over its domain, its domain being no other than It Self.
It is the Eternal Reality which is not conscious of anything separate from it, being Pure Consciousness Itself.
It is beyond happiness and despair, destiny and free will, and beyond time and space.
It is beyond the different paths, philosophies, religions and conceptions of the Divine. All of these concepts are play of the mind which sees differences everywhere.
People with much confidence speak of their way, their path, and their religion. People speak of their God, their insights, their Realization, etc. This is all fine.
Self-Inquiry starts when an aspirant sincerely inquires with intensity, Who is this “I” which conceptualizes all such things.
The root question in Self-Inquiry is “Who Am I?” That is the method taught by Sri Ramana Maharshi for reflective Self-Inquiry.
Real introversion of the mind can only take place when we look directly for the source of our very existence.
The feeling and sense of “I” or “Me” that everyone has naturally, is the clue to resolving the mystery of Existence.
Where does this sense of “I Am” comes from. Looking within and following this sense to its source leads to the Knowledge of the Self.
Namaste and love to all