There are two kinds of audiences - the ordinary ones who desire the transitory heaven and other pleasures obtained as a result of ritual sacrifices, and the more advanced seeker who seeks to know the truth beyond the form, time and space. The Religion is meant for the first audience, to help lead its followers along the way. The Spirituality is meant for those who wish to go beyond such transient pleasures.
All mantras are based on non-Vedic Gods. non-Vedic Gods are imaginary Gods based on the false self (ego) within the false experience(dualistic illusion).
Realizing the real God is real worship. Whatever based on the false God yield no fruits. It is necessary to realize what God supposed to be in actuality.
God is not physical. God is present in the form of the Spirit. The Spirit is the cause of the world and the Spirit itself is uncaused.
On the standpoint of the Spirit, the form, time, space and name are mere an illusion. The spirit alone is real and all else is an illusion. In reality, the spirit (God) matter (the world in which we exist) are one.
The Bhagavad Gita: ~ Brahmano hi pratisthaham ~ Brahman (God) is considered the all-pervading consciousness (Spirit), which is the basis of all the animate and inanimate entities and material. (14.27).
When Bhagavad Gita says, God is considered the all-pervading consciousness (Spirit) which is the basis of all the animate and inanimate entities and material then nothing has to be accepted other than consciousness a God.
Lord Krishna Says Ch ~V: ~ “Those who know me in truth.". The last two words (tattvataha) are usually ignored by pundits, but they make all the difference between the ordinary concept of God and the truth about God.
The dualistic worship of "God” is only for the ignorant populace. The God in truth is only Atman, the innermost Self. In reality, there is no dualities, no differentiation. Only Atman exists.
The Vedas confirms God is Atman (spirit), the innermost Self.
Rig Veda: ~ The Atman (Soul or Spirit) is the cause; Atman is the support of all that exists in this universe. May ye never turn away from the Atman the innermost self. May ye never accept another God in place of the Atman nor worship other than the Atman?" (10:48, 5)
Rig-Veda 1-164-46 and Y.V 32-1 clearly mention that God is “One”.
Rig Veda declares God is ‘ONE’ and God is Atman, then why believe and worship in place of real God.
Brihad Upanishad: ~ “If you think there is another entity, whether man or God there is no truth."
When Upanishad itself declares: ~ Sarvam khalvidam brahma ~ all this (universe) is verily Brahman. By following back all of the relative appearances in the world, we eventually return to that from which it is all manifest – the non-dual reality (Chandogya Upanishad).
All the mantras and rituals are meant for the ignorant populace, which strongly believes, the world in which he exists as a reality. 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 the form, time, and space.
That is why Sage Sri, Sankara VC~.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?
VC- v6~ 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
Sage Sri, Sankara goes on to say: ~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 a 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 perverted arguments.
Sage Sri, Sankara: ~"That which permeates all, which nothing transcends and which, like the universal space around us, fills everything completely from within and without, that Supreme non-dual Brahman (God)."
Thus, truth realization is Self-realization. The Self-realization is God realization. God -realization is real worship.