Modern science leads in the end to the discovery that the world is the mind and that causality is non existent. Gaudapada and Sankara made precisely the same discovery, because they had the spirit of science, the desire for ascertaining facts and being sages of the highest order, saw the truth.
As one digs into the annals of the history of India one becomes aware of the fact that, Science was pursued in ancient India but only the philosophical aspect of it, which examined the matter and ultimately found it to be idea, which thrust aside personal predilection in its investigation. India however ignored the practical aspect of science and was not interested in the applications of science: hence India was backward in applied science but far ahead of west in pure scientific method. For 2000 years India has been a slave nation which has lost even this scientific knowledge which it once possessed as it has lost its philosophy of truth. Today the gate to Advaita must be modern science and nothing else.
The Hindu theory that the mind actually travels to an object is absurd. Why does the mind get a different and a more correct impression as it approaches nearer to a hill. Why did not the mind, if it traveled, bring a correct report at the very first. Mandukya unpunished has rejected this theory, which is unscientific. Scientific fact about visual sensation is correct so far as it says the optic nerve communicates its vibration to the brain. But how does the brain transmit it to the mind? Here all is theory and confusion.
The same truths which modern science gives can be found in the declaration of the Sage, Sri Sankara and Gaudapada. But the Advaitic sages kept their supreme states of steady wisdom a secret.
Advaitic Sage, Sri, Sankara' gave religious, ritual or dogmatic instruction to the mass but pure philosophy only to the few who could rise to it. Hence the interpretation of his writings by commentators is often confusing because they mix up the two viewpoints. Thus they may assert that ritual is a means of realizing Brahman, which is absurd.
In the commentary to "Brahma Sutras Sri, Sankara writes:- " "The highest beatitude is not to be attained by Yoga." (Sacred Books of East Series page 298 Vol.1.) And he also says Samadhi is the same as sleep (p.312).
---This indicates that yoga is not the means to self realization. And yogic Samadhi is not non dual wisdom.
Thoughts and thinker are nothing to do with the formless witness. The witness is that witnesses the thoughts and thinker together and remains always in the within the waking or dream as their formless substance.
People think that, more they think, the more they will get; but it is really an error. It remains only a thought and gives them back only thoughts. Anything seen, observed, cannot be the Self or the Witness.
Consciousness (soul) is the substance and the witness of the duality. The duality is present in the form of mind. The mind is present in the form of the universe. The universe appears as waking or dream and diapers as deep sleep. The one which is aware of the coming and going of the three states is neither the waking entity nor the dream entity but the formless soul, which is present in the form of consciousness. When the soul becomes aware of its formless non-dual true nature in the midst of duality it is called self –awareness. It is foolish to limit the consciousness only to duality because the consciousness pervades all the three states
The earliest ancient sages used the word ‘I’ to the witness of the three states not to the ego as moderns use it and think the ‘I’ without the body is the self. The seeker has to understand the fact ‘I’ is not the self but the witness of the ‘I’ is the true self, which is eternal.
People think that the ‘soul’ or ‘spirit’ is something different from the mind. They believe that the mind is really two. This is the confusion among religionists and intellectuals. If ‘Soul’ has any meaning, if ‘spirit’ has any meaning, so long as one thinks of them, they are merely ideas. No, Mind is the highest: it is consciousness, non-dual wisdom.
The individual is a bundle of memories, desires within the waking or dream. The memories and desires are part of the duality. Therefore the individual self is entirely part and parcel of the mirage. Peoples' ideas of that they will go to some world after death, some astral plane or religious heavens will disappear as nonsense with the disappearance of belief in the reality of the ‘I’.
Sage Sri, Sankara says: one must first know what is before him. If he cannot know that, what else can he know or understand? If he gives up the external world in his inquiry, he cannot get the whole truth.
VC 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.
Even "Jesus said:-"Those who seek should not stop seeking until they find. When they find, they will be disturbed. When they are disturbed, they will marvel, and will reign over all." (Gospel of Thomas 2)
"The Kingdom of God is inside you and all around you, Not in a mansion of wood and stone. Split a piece of wood and God is there, Lift a stone and you will find God." (Gospel of Thomas)
When the seeker indulges in deeper self-search becomes aware of the fact that, the experience of birth, life, death and the world are mere illusion created out of spirit (consciousness), which is the innermost self.
Thus Advaitic sages Sri, Sankara and Goudpada declared the non-dualistic truth as ultimate truth or Brahman is rational truth and scientific truth.