Sage Sankara says:~ Of what avail are the Vedas and (other) Scriptures, Mantras (sacred formulae) and medicines to such a one? +

Mundaka Upanishad: ~ The study of the Vedas, linguistics, Rituals, astronomy, and all the arts can be called lower knowledge. The higher Is that which leads to Self-realization. The eye cannot see it; the mind cannot grasp it. The deathless 'Self' has neither caste nor race, neither eyes nor ears nor hands nor feet. Sages say this Self is infinite in the great And in the small, everlasting and changeless, The source of life.

Ish Upanishad says:~Those people who have neglected the attainment of Self-knowledge have thus committed suicide.

Sage  Sankara says:~  Of what avail are the Vedas and (other) Scriptures, Mantras (sacred formulae), and medicines to such a one?

For one who wants to acquire Self-knowledge or Brahma Gnana or Atma Gnana, the mantas will not help to realize the truth, which is beyond form, time, and space.

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?

Let erudite scholars quote all the scripture, let Gods be invoked through sacrifices, let elaborate rituals be performed, let personal Gods be propitiated---yet, without the realization of one‘s identity with the Self, there shall be no liberation for the individual, not  even in the lifetimes of a hundred Brahmas put together

A sickness of not cured by saying the word “medicine.” You must take the medicine. Liberation does not come by merely saying the word “Brahman.” Brahman must be experienced. Until you allow this apparent universe to dissolve from your consciousness until you have realized Brahman, how can you find liberation just by saying the word Brahman? The result is merely noise. Until a man has destroyed his enemies and taken possession of the splendor and wealth of the kingdom, he cannot become a king by simply saying “I am a king.”

A buried treasure is not uncovered by merely uttering the words: “Come forth.” You must follow the right directions, dig, remove the stones and earth from above it, and then make it your own. In the same way, the pure truth of the Atman, which is buried under Maya and the effects of Maya, can be reached by meditation, contemplation, and other spiritual disciplines but never by subtle arguments.

Mundaka Upanishad condemns rituals:~  The Para or Higher knowledge is the knowledge of the Supreme Being while the Apara or Lower Knowledge is that of following sacrificial rites and ceremonies. (1/2/ 1 – 6)

As per the scriptures, the three "Ashrams" or stages in life were originally intended for three grades of intelligence thus:

v             Religion: low intellects had to do 'karmas' works, ritual actions, chanting of mantras and indulging in bhajans and prayers, etc.

v             Middle intellects:  Yoga: taking yellow robes, going to caves, ashrams, etc.

v             High intellects: wisdom who wanted the truth is concerned with no external rites no prayers or sanyasa but depend solely on the Soulcentric reasoning for their path.

Thus, the seeker has to choose his path,  according to his choice.  Without an intense urge to know the truth and sharpness to grasp the truth, it is difficult to tread the path of wisdom never mix different paths with each other, and make a cocktail because it leads to all sorts of doubts and confusion.  

Katha Upanishad says:~ Fools dwelling in darkness, but thinking themselves wise and erudite, go round and round, by various tortuous paths, like the blind led by the blind. (Ch~ II-5 P-14) 

Sage Sankara: ~   VC Neither sacred baths nor any amount of charity nor even Hundreds of pranayamas* can give us the knowledge about our own Self.  The firm experience of the nature of the Self is seen to proceed from inquiry along the lines of the salutary advice of the wise. (13) 

Sage  Sankara says:~ The scriptures dealing with rituals, and rewards are therefore addressed to an ignorant person. Thus, the rituals are meant for ignorant people.

Sage Sankara: ~ "Though I wear these robes of a Sanyasin, it is only for the sake of bread."

~ This shows he was wearing the religious robe only for the sake of bread." Thus, it means those who are wearing religious robes for the sake of bread.

All the rituals based on the false belief of Gods will not yield any fruits and they are meant for the ignorant populace who are unable to grasp the God beyond the form, time, and space.

One of Sage Sankara’s missions was to wean people away from a ritualistic approach advocated by Mimamsakas and to project wisdom (jnana) as the means of liberation in the light of Upanishad teachings.

Sage Sankara criticized severely the ritualistic attitude and those who advocated such practices. However, the orthodox texts that combined rituals with wisdom (jnana_karma_samucchaya) more in favor of the Mimamsaka position came into vogue, projecting Sage Sankara as the rallying force of the doctrine.

 Sage Sankara:~ (11) As regards the rituals, Sage Sankara says, the person who performs rituals and aspires for rewards will view himself in terms of the caste into which he is born, his age, and the stage of his life, his standing in society, etc. In addition, he is required to perform rituals all through his life. However, the 'Self' has none of those attributes or tags. Hence, the person who superimposes all those attributes on the changeless, eternal Self and identifies the Self with the body is a confusing one for the other and is, therefore, an ignorant person. The scriptures dealing with rituals, rewards, etc. are therefore addressed to an ignorant person. -Adhyasa Bhashya 

Sage Sankara:~ (11.1) This ignorance (mistaking the body for Self) brings in its wake a desire for the well-being of the body, aversion for its disease or discomfort, fear of its destruction, and thus a host of miseries(anartha). This anartha is caused by projecting karthvya (“doer” sense) and bhokthavya (object) on the Atman. Sankara calls this adhyasa. The scriptures dealing with rituals, rewards, etc. are, therefore, he says, addressed to an ignorant person. -Adhyasa Bhashya 

Sage Sankara:~ (11.2) In short, a person who engages in rituals with the notion “I am an agent, doer, thinker”, according to Sage Sankara, is ignorant, as his behavior implies a distinct, separate doer/agent/knower; and an object that is to be done/achieved/known. That duality is Avidya, an error that can be removed by Vidya. -Adhyasa Bhashya 

Sage Sankara: ~ (12) Sage Sankara affirming his belief in one eternal unchanging reality (Brahman) and the illusion of plurality, drives home the point that Upanishads deal not with rituals but with the knowledge of the Absolute (Brahma Vidya) and the Upanishads give us an insight into the essential nature of the Self which is identical with the Absolute, the Brahman. -Adhyasa Bhashya 

No conceptual God can exist, apart from consciousness.  People are not aware of the fact that there is no individual God that can exist, apart from the Soul, which is in the form of consciousness. 

Thus the Soul or consciousness is the Self.   If there is no consciousness, then there is no physical body, no ego, no universe, no religion, and no conceptual God.:~Santthosh Kumaar