Sage Sankara’s missions was to wean people away from a ritualistic approach and to project Advaitic wisdom as the means of liberation.+

First Mundaka - Chapter 2 (10) - Ignorant fools, regarding sacrifices and humanitarian works as the highest, do not know any higher good. Having enjoyed their reward on the heights of heaven, gained by good works, they enter again this world or a lower one.

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)

Mundaka Upanishads:~ ‘So-called spiritual pundits and learned are called children because a child takes whatever it thinks as truth. The question never occurs to children “Is what I have seen or thought really the truth?" (P.334 line 9)

Sage  Sankara says: ~ ‘The scriptures dealing with rituals, rewards are therefore addressed to an ignorant person.  

The rituals mentioned in the karmakanda of the Vedas are sought to be negated in the jnanakanda which is also part of the same scripture. While the karmakanda enjoins upon you the worship of various deities and lays down rules for the same, the jnanakanda constituted by the Upanishads ridicules the worshipper of deities as a dim-witted person no better than a beast.

 This seems strange, the latter part of the Vedas contradicting the former part. The first part deals throughout with karma, while the second or concluding part is all about jnana. Owing to this difference, people have gone so far as to divide our scripture into two sections: the Vedas (that is the first part) to mean the karmakanda and the Upanishads (Vedanta) to mean the jnanakanda. 

Mundaka Upanishad: ~ “The rituals and the sacrifices described in the Vedas deal with lower knowledge. The Sages ignored these rituals and went in search of higher knowledge. ... Such rituals are unsafe rafts for crossing The sea of samsara, of birth and death. Doomed to shipwreck are those who try to cross The sea of samsara on these poor rafts. Ignorant of their own ignorance, yet wise in their own esteem, these deluded men proud of their vain learning go round and round Like the blind led by the blind.

The essence of Mundaka Upanishad: ~ “Do not be satisfied with rituals, yoga, etc., which are good in their own way, but inquire. Into what? Brahman and Atman are things you can never see. So do not inquire into them. Inquire into the world around you, which you can see.

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

~ ‘This shows he was wearing the religious robe only for the sake of bread." Thus, it means the one who is wearing the religious robe 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, 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. Sage 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, the 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 the consciousness.  People are not aware of the fact that there is no individual God can exist, apart from Soul, which is in the form of consciousness. 

Thus the Soul or the 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