Thoughtlessness is not Advaitic wisdom. The thinker thought and the world are part of the illusion.+

The world is the same in the case of a Gnani and in the case of the ignorant.  A Gnani has realized the world in which he exists is merely an illusion created out of the Soul, which is present in the form of consciousness whereas an ignorant thinks the world, in which he exists is a reality. 

The look of the world in which we exist depends upon the medium through which the Seer views it. In fact, our mental and intellectual condition will determine the world that confronts us observed and experienced. A Gnani viewing the world in which he exists see differently for the ignorant viewing the same world.   Each one of them interprets the world that confronts them in terms of their existing knowledge.  A Gnani sees the world, in which he exists as the illusory play of the Soul, which is present in the form of the consciousness whereas the ignorant see the world in which he is born, lives, and dies as a reality. A Gnani is one who gained Self-knowledge and has realized the truth, which is hidden by the illusory form, time, and space.  

A Gnani is fully aware of the fact that the Soul is the  ‘Self’. The Soul is the fullness of consciousness without the division of the form, time, and space. in the realm of the Soul, the Self, the form, time, and space are one, in essence. That essence is consciousness.  

The Soul, which is present in the form of consciousness, is second to none. The Soul is the ultimate truth or Brahman or God. 

Chandogya Upanishads:~  This universe comes forth from Brahman and will return to Brahman. Verily, all is Brahman. A person is what his deep desire is. It is our deepest desire in this life that shapes the life to come. So let us direct our deepest desires to realize the ‘Self’. 

The world is both real and unreal. It is real because it is a manifestation of the consciousness, but is unreal, in the sense, that it is not absolute and eternal like consciousness itself’.

People's approach is more practical, and they stuck with the reality of the world, they take it as real. That is why all the confusion.

That is why Sage Sankara says: ~ 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.

VC~ 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. 

Sage Sankara says: ~ V.63 ~ "Without knowing and examining the external world, one can’t know Truth, as the idea that the external world exists, won't go. It can go only by an inquiry into the nature of the external world.

To say the universe is an illusion without first examining it and inquiring into its nature thoroughly is to delude oneself. This world is common to every one of us; therefore the seeker of truth must begin his inquiry with it. It is only after he has inquired into the nature of the objective world, he realizes the universe which through ignorance appears as of diverse forms, is nothing else but the Soul which is present in the form of consciousness is absolutely free from all the limitations of human thought.

 It is erroneous to believe the general impression is that the universe disappears to a Gnani, that he sees nothing in Samadhi. Only by deluded persons will have such an impression?   Nothing is destroyed. Only ignorance disappears and the unreal nature of the universe is exposed.  The universe which appears as waking experience is the dualistic illusion.

A Gnani has the full and firm conviction that everything is consciousness in the midst of dualistic illusion.  The Soul, Self being aware of its true nature in the midst of dualistic illusion is called Self-awareness.  

The universe or the waking experience will not disappear.  It is there always but the unreal nature of the waking experience is exposed in the midst of dualistic illusion through Advaitic wisdom.

If one thinks its mere disappearance in yogic Samadhi is the ultimate truth or Brahman, then he would get it in deep sleep.  Thus, the yogic Samadhi is not the Advaitic wisdom. Thoughtlessness is not Advaitic wisdom.

Thoughtlessness is not wisdom. The thinker thought and the world are part of the illusion. The thought will not arise without form, time, and space. The form, time and space will not arise without the mind. 

The mind ceases to exist without the Soul which is in the form of the Spirit. Therefore, there is a need to know the 'Self' is not limited to the physical entity (you), but it pervades in everything and everywhere in the experience of diversity (waking or dream).  

The deep sleep is the state of thoughtlessness, silence, wordlessness, and silence but it is not considered as a state of oneness because anyone can take a sleeping pill and will be able to get the state of the Oneness. 

Thus, trying to imitate the state of oneness in duality by observing silence, thoughtlessness, wordlessness, or by yogic Samadhi or surrendering to the physical Guru, the Advaitic wisdom will not dawn. Without the Advaitic wisdom, ignorance will not vanish. Thus, getting rid of ignorance through wisdom is the only way to realize the ultimate truth or Brahman.   

Remember:~ 

Manduka Upanishads: ~    Even the Gods cannot find out who is a Gnani because he bears no external mark. Neither nudity nor the religious robe has anything to do with him. 

Sage  Sankara clearly indicates in the Viveka Chudamani (2) that the Knower of the Atman (A Gnani) "bears no outward mark of a holy man" (Stanza 539).  

Sage  Sankara page 482: On Gnani:~ "The knower of Brahman wears no signs. Gives up the insignia of a monk's life…his signs are not manifest, nor his behavior." 

Sage Sankara says that the Knower of the Atman or the knower of Brahman or Brahma Gnani.

When the knower of Brahman (Gnani) wears no signs it means he does not identify himself as Guru or yogi or teacher or Swami because a Gnani sees the form, the time and space are one in essence. Thus, there is unity in diversity in his realization. :~Santthosh Kumaar