Self-Realization is direct realization of the ultimate truth or real god, in contrast with traditional paths, which are indirect.

'I' or 'I AM'  is th inborn samskara or conditioning. The ‘I’ or  ‘I AM’ is  cause of the ignorance. Thus one has to get rid of the ignorance by overcoming the intoxication of ‘I’ or I AM which intoxication stuff .

That is why Sri, Sankara says in VivekaChudamani :- 

61. For one who has been bitten by the serpent of Ignorance, the only remedy is the knowledge of Brahman. Of what avail are the Vedas and (other) Scriptures, Mantras (sacred formulae) and medicines to such a one?

62. A disease does not leave off if one simply utter the name of the medicine, without taking it; (similarly) without direct realization one cannot be liberated by the mere utterance of the word Brahman.

63. Without causing the objective universe to vanish and without knowing the truth of the Self, how is one to achieve Liberation by the mere utterance of the word Brahman ? — It would result merely in an effort of speech.

64. Without killing one’s enemies, and possessing oneself of the splendor of the entire surrounding region, one cannot claim to be an emperor by merely saying, ‘I am an emperor’.

65. As a treasure hidden underground requires (for its extraction) competent instruction, excavation, the removal of stones and other such things lying above it and (finally) grasping, but never comes out by being (merely) called out by name, so the transparent Truth of the self, which is hidden by Maya and its effects, is to be attained through the instructions of a knower of Brahman, followed by reflection, meditation and so forth, but not through perverted arguments.

 

People who are yearning for spiritual truth will not find it through intellectual speculation and assumption. Intellectual truth is individual truth.  Religious truth is individual truth and it is not universal truth because the religion is based on individuality. 

Self-Realization is direct realization of the ultimate truth or real god, in contrast with traditional paths, which are indirect. And the other paths cannot lead to the ultimate destination because they are based on the false self, which they hold as real self and false experience as reality. 

Until and unless one overcomes physical shackle it is impossible to understand and assimilate the non-dual truth, which is beyond the physical existence or the universe.  Consciousness itself is lord of itself though not of the universe. And having nothing it has all.

Gaudapada quotes from the Upanishads: "There's no plurality here"; "The Lord [Atman] through his powers appears to be many"; "those who are attached to creation or production or origination go to utter darkness"; "the unborn is never reborn, for who can produce him [Atman]?”

It is only who base on ‘I’ or ‘I AM’ as self, argue and quarrel amongst themselves. The people who are fully aware of the fact that, the form, time and space are mere mirage created out of consciousness have no reason to quarrel, because for them everything is consciousness and no second thing exist other than consciousness. 

 

Discrimination between the Real and the unreal helps to unfold the truth. A firm conviction to the effect that the soul, which is in the form of consciousness, is real and the mind, which is in the form of universe is  unreal, is designated as discrimination between the Real and the unreal.

The ‘I’ or ‘I AM’ are mere words.  The reality is beyond thoughts and words. The words have meaning in duality. Duality exists until mind exists. Mind exists where there is division of form, time and space. If there is no division of form, time and space, than there is no mind. Words are used as a tool to name individual objects and feelings within the duality. The words become meaningless when one becomes aware of the formless substance of the mind, which is consciousness.

Consciousness is our inner most self. From the standpoint of our inner most self, the mind is mere mirage. If mind is mere mirage then the form, time and space are mere mirage. If form, time and space are mere mirage than the thoughts and words which rises within the scope of form, time and space are also part and parcel of that mirage. Thus body, ego, words, thoughts, and whatever the contents of the universe are within the mirage created out of single stuff that is consciousness. Thus it is necessary to know 'What is mind?' and 'What is the substance of the mind?' and 'What is the source of the mind?', in order to realize the words are meaningless in the realm of truth.