Sage Sankara does not believe in the bookish knowledge. Sage Sankara denies the authority of any book over any other book.+

Sage  Sankara does not believe in the bookish knowledge. Sage Sankara denies the authority of any book over any other book.

Sage Sankara denies emphatically any one book contains all the truths about Brahman or God.

It is impossible to realize the Self through bookish knowledge. A feeling of profound respect for physical Guru is still more difficult to uphold. If you are seeking truth know must not cling to any physical Guru or his teaching.

Sage Sankara himself had often said that his philosophy was based on Sruti, or revealed scripture. This may be because, Sage Sri, Sankara addressed the ordinary man, who finds security in the idea of causality and thus, in the idea of God—and Revelation is indispensable to prove the latter. He believed that those of superior intelligence, have no need of this idea of divine causality, and can, therefore, dispense with Sruti and arrive at the truth of Advaita by pure reason.

Sage Sankara says: ~ VC-47 All the effects of ignorance, root, and branch, are burnt down by the fire of knowledge, which arises from discrimination between these two—the Self and the not-Self.

Sage Sankara says ~ VC-162- There is no liberation for a person of mere book-knowledge, howsoever well-read in the philosophy of Vedanta, so long as one does not give up the false identification with the body, sense organs, etc., which are unreal.

Tripura Rahasya: ~ Second-hand knowledge of the Self-gathered from books or Gurus can never emancipate a man until its truth is rightly investigated and applied; only direct realization will do that. Realize yourself, turning the mind inward. (18: 89)

Remember:~ 

Sage Sankara strongly advocated the study of Upanishads, and at the same time cautioned that the study of Upanishads alone would not lead to moksha. In matters of such as spiritual attainment, one’s own realization was the sole authority and it cannot be disputed

Sage Sankara also said the study of Upanishad was neither indispensable nor a necessary prerequisite for attaining the human goal, the moksha.

Sage Sankara pointed out; even those who were outside the Upanishad fold were as eligible to moksha as those within the fold were. He declared that all beings are Brahman, and therefore the question of discrimination did not arise. All that one was required to do was to get rid of ignorance (Avidya or duality).

That is why Sage Sankara says: ~ VC-  56. Neither by Yoga, nor by Sankhya, nor by good work, nor by learning, but by the realization of one's identity with Brahman is Liberation possible, and by no other means.

58. Loud speech consisting of a shower of words, the skill in expounding the Scriptures, and likewise erudition - these merely bring on a little personal enjoyment to the scholar but are no good for Liberation.

59. The study of the Scriptures is useless so long as the highest Truth is unknown, and it is equally useless when the highest Truth has already been known.

60. The Scriptures consisting of many words are a dense forest which merely causes the mind to ramble. Hence, men of wisdom should earnestly set about knowing the true nature of the Self.

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 utters 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.

66. Therefore, the wise should, as in the case of disease and the like, personally strive by all the means in their power to be free from the bondage of repeated births and deaths.

Then there is no need for the scriptures, religion, and idea of God. One has to be more rational to realize the Advaitic truth, which is the ultimate truth or scientific truth. 

If you are trading the Atmic path then remember: ~

Sage Sankara says: ~ There is no need to study the Scriptures to realize the ultimate truth or Brahman

~ then why you indulge in studying the scriptures.

Sage Sankara says: ~ There is no need to study philosophy to realize the ultimate truth or Brahman

~then why indulge in studying philosophy.

Sage Sankara says: ~ There is no need to indulge in rituals  to realize the ultimate truth or Brahman

~then why indulge in rituals.

Sage Sankara says: ~ There is no need to indulge in yoga to realize the ultimate truth or Brahman

~then why indulge in yoga.

Sage  Sankara says that the transparent Truth of the Self, which is hidden by the illusion, is to be attained through the instructions of a knower of Brahman, (Gnani).

~ then why stick to a Guru who is not a Gnani.

Sage Sankara says:~ “The exercise in discrimination between real and unreal and renunciation of the false leads truth realization.

Atman is Brahman. The Atman is the Self is non-dual because there is no second thing that exists other than the Atman. Atman is present in the form of consciousness. Consciousness is the only true reality, and everything else, which appears as form, time, and space are merely an illusion. : ~ Santthosh Kumaar