The merciful Veda teaches karma and Upaasana to people of lower and middling intellect, while Jnana is taught to those of higher intellect.

Gaudapada says that:- The merciful Veda teaches karma and Upaasana to people of lower and middling intellect, while Jnana is taught to those of higher intellect.

This clearly indicates that religion, which is based on individual conduct, prescribes karma and Upaasana to people of lower and middling intellect, therefore religion is for the lower intellect. And wisdom is for those are capable of inquiring into their own existence.  

Brahman is considered the all-pervading consciousness which is the basis of all the animate and inanimate entities and material. (brahmano hi pratisthaham, Bhagavad Gita 14.27)

If Brahman is considered the all-pervading consciousness then, it is necessary to realize, the consciousness as self, which pervades all the three states to realize the fact that there is no second thing exists other the consciousness. Thus, consciousness (Atman) is ultimate truth (Brahman).  

As indicated in ISH Upanishads: - By worshiping gods and goddesses you will go after death to the world of gods and goddesses. But will that help you? The time you spend there is wasted, because if you were not there you could have spent that time moving forward towards Self-knowledge or Brahma Gnana or Atma Gnana, which is your goal. In the world of gods and goddesses you cannot do that, and thus you go deeper and deeper into darkness.

It clearly indicates that:-If the human goal is to acquire Self-Knowledge then why one has to indulge in rituals and glorifying the conceptual gods and goddesses to go in to deeper darkness. Instead   spend that time moving forward towards Self-knowledge, which is one’s prime goal.   

Since it is eternal and infinite, it comprises the only truth. The goal of Vedic religion, through the various yogas, is to realize that the consciousness (Atman) is actually nothing but Brahman.

 The Vedic pantheon of gods is said, in the Vedas and Upanishads, to be only higher manifestations of Brahman. For this reason, "ekam sat" (all is one), and all is Brahman.

Thus, the goal is to realize Atman (consciousness).  If Atman (consciousness) is nothing but Brahman and by realizing Atman (consciousness) as Brahman (ultimate truth) is truth realization or Self-Realization , then there is no need to follow religion, study scriptures or glorifying gods and gurus and  follow the path of doubts and confusion by losing oneself in the labyrinths of philosophy, when there is an easier path.  By mentally tracing the source of the mind from where it rises and subsides one becomes aware of the fallacy of the mind, which rises as waking or dream and subsides as deep sleep.  The mind raises form consciousness and subsides as consciousness.

They alone in this world are endowed with the highest wisdom who are firm in their conviction of the sameness and birthlessness of Atman. The ordinary man does not understand their way. [Chapter IV — Alatasanti Prakarana 95-P-188 in Upanishads by Nikilanada]

Therefore, if one is seeking truth he has to know his true self is not physical but is the consciousness, which is in the form of consciousness.  

Self-Knowledge or Brahma Gnana or Atma Gnana cannot be attained by study of the Vedas and intellectual understanding or by bookish knowledge.  Therefore there is no use of studying the Vedas and other scriptures in order to acquire the non-dual wisdom.  That is why Buddha rejected the scriptures, and even Sri, Sankara indicated that, the ultimate truth lies beyond religion, concept of god and scriptures. 

Thus it is necessary to follow the formless path dropping all the accumulated baggage and move forward to reach the destination in lesser time and effort.