Adyatma is nothing to do with religious sect or creed and religious belief. Adyatma is pure spirituality. Knowledge of Atma is Adyatma. Advaita is Adyatma.
Adyatma is the knowledge of the truth beyond the form, time, and space. Bifurcate religion, yoga, and theoretical philosophy and based the truth on the Athma it is Adyatma.
Adyatma is based on the ultimate truth which is based on the Atma or Spirit, which is the Self. The Spirit is Brahman or God in truth.
Sage Sankara's Advaitic wisdom is pure spirituality or Adyathma.
Rig Veda:~ 'Prajnanam Brahma'- Consciousness is the ultimate reality or Brahman or God in truth.
No religious God can exist, apart from consciousness. Religious people think God is somewhere, up there, monitoring every act of the people, guiding the lost, and uplifting the poor. God is the one who punishes the evil and rewards the benevolent.
Some people even claim of seeing them in stone idols or some conceptual belief, in inanimate or living things. Is it our faith that makes us believe that there is some supreme power above us or is it a reality, can never be answered. Until this conviction is there one is in the grip of ignorance.
Due to ignorance, the dualistic illusion (the world in which we exist) is experienced as a reality. Therefore, there is a need to verify the fact that, the Self is not you but it is the Soul, which is present in the form of consciousness.
Even Bhagavad Gita says: ~ Brahmano hi pratisthaham Brahman (God) is considered the all-pervading consciousness which is the basis of all the animate and inanimate entities and material. (Gita 14.27)
If God is Spirit, then how does the man know God created the world? There is no proof. If the man had seen God creating the world, he could admit it, but how could he have seen God before he came into existence? (i.e. were created).
He who thinks God is one and the Soul is another can never be able to understand, assimilate realize the non- dualistic or Advaitic truth.
It is not the man, who has to be free, but it is the Soul, the innermost 'Self ' has to be free by realizing it is not the man perceiving the world.
People want to get freedom but freedom comes only when the Soul wakes up without the illusory body and the illusory world (duality). It is the Soul, the innermost ‘Self’ is in the cage of illusion. It is the Soul that wants to get out of the illusion because the illusion and the reality are one in essence. That essence is the Soul, which is present in the form of consciousness.
Thus, all that man experiences within the dualistic illusion of practical life within the practical world and seeing the vision, speaking to God, seeing God are a reality within the dualistic illusion.
From the non-dualistic perspective, there is no second thing exists other than consciousness (spirit). Thus, consciousness is the ultimate truth or Brahman or God. From the standpoint of Brahman or God, everything is Brahman or God in truth.
Sage Sri, Goudpada quotes from the Upanishads: ~"There's no plurality here"; "The Soul through its powers appears to be many"; "those who are attached to creation or production or origination go to utter darkness"; "the unborn is never reborn, for what can produce it?”
People are not aware of the fact that there is no individual God can exist, apart from the Soul, which is in the form of consciousness. Thus, the Soul is the true Self. If there is no Soul, then there is no physical body, no ego, no universe, no religion, and no conceptual God.
People think that there must be a creator of this universe. if one thinks physical entity or the ego as self, then there is a creator, but if one thinks, the Soul as the Self, then there is nothing exists other than the Soul, which is present in the form of the consciousness.
If one objectifies and sees a universe, then he is bound to see many things besides himself and postulate a God, the creator. The body, the idea of the God and world rise and set together from, and into, the Soul, the ‘Self’. If God is apart from the ‘Self ‘, then he would be self-less, that is, outside existence, that is, non-existent. : ~ Santthosh Kumaar