Katha Upanishad:~ "This Atma is NOT to be attained by a study of the Vedas.+

The Sruti itself says:~ "This Atma is NOT to be attained by a study of the Vedas. (Katha Upanishad I, 2, 23.)

Therefore, all the non-Vedic add-ons and attribute-based knowledge, which is inferior, have to be bifurcated and excluded to know the ultimate truth or Brahman or God in truth.

The seeker of truth has to drop all the inferior knowledge based on the attributes and go beyond Vedas to understand assimilate and realize the ultimate truth or Brahman.

One has to go beyond Vedas means to go beyond religion. To go beyond religion means, to go beyond the religious idea of God. Thus, going beyond Vedas, religion and religious God means going beyond illusion. That is the end of Vedas [Veda –antha]

When one goes into the annals of history it looks like the true Advaita expounded by Sage  Sankara was lost or mutilated by the Orthodox cult, because orthodox preaching and practices are dualistic

Sage Sankara says in Brahma Sutras: that Brahman is the cause of the world, whereas in Mandukya he denies it. This is because he says that at the lower stage of understanding, the former teaching must be given, for people will get frightened as they cannot understand how the world can be without a cause, but to those in a higher stage, the truth of non-causality can be revealed.

Sage Sankara himself has warned us not to use ambiguous words and to practice semantic analysis in his book "Definition of one's own Self. [Page 199, v.24 of "Sankara's Selected Works]

Remember:~

The Advaitic wisdom of Sage Sankara has nothing to do with religion, caste, rituals, worship, yoga, and other practices. Therefore an obvious disparity between Sage Sankara‘s path of Gnana and the path of Karma. The path of Gnana is meant for the advanced seeker of truth and the path of Karma is meant for the ignorant populace.

Even Sage Sankara appears in the vision and tells the orthodox people the path of orthodoxy is the path of ignorance they will not be able to drop their inherited samskara or conditioning, which they think is the only way to reach heaven and reap a happy life in the next life.

As regards the rituals, Sage Sankara says, that 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 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.- (11- Adhyasa Bhashya)

The orthodox people only teach and preach their knowledge of ignorance but none of them wants to know God in Truth, which is hidden by the dualistic illusion or Maya.

Remember:~

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 still remain in ignorance of the Atman the real God.

As a person, one performs rituals throughout his life. The person who performs rituals and aspires for rewards will view the world in which he exists as a reality. However, the Soul, the Self unborn eternal hidden by the world in which he exists. From the standpoint of the Soul, the world in which he exists is merely an illusion.

The scriptures dealing with rituals, rewards, etc. are therefore addressed to an ignorant person.

First Mundaka - Chapter 2 (9) ~ Children, immersed in ignorance in various ways, flatter themselves, saying: We have accomplished life's purpose. Because these performers of karma do not know the Truth owing to their attachment, they fall from heaven, misery-stricken, when the fruit of their work is exhausted.

First Mundaka - Chapter 2  ~ Fools, dwelling in darkness, but wise in their own conceit and puffed up with vain scholarship, wander about, being afflicted by many ills, like blind men led by the blind.

Ish Upanishad declares:~ Those people who have neglected the attainment of Self-knowledge and have thus committed suicide 10/11/12

The religious orthodox people who have neglected the attainment of Self-knowledge and have thus committed suicide, as it were, are doomed to enter those worlds after death.:~Santthosh Kumaar