Lord Krishna Krishna calls it "the supreme secret."+

The seeker of truth should not start with the idea of God.  The seeker does not know whether there is God or not. There is no proof.  The seeker needs proof of God's existence.

There is need not doubt that people saw Shiva, Jesus, etc. That they saw visions may be an undeniable fact. But the question is “Was what they saw the Truth?" They no doubt had such vision but they never stopped to inquire if their visions be true. 

After years of effort glorifying Christ when Christian closes his eyes and Christ comes to him. 

After years of effort glorifying  Krishna when a Hindu closes his eyes and Krishna comes to him.

After years of effort glorifying Buddha when a Buddhist closes his eyes and Buddha comes to him.

After years of effort glorifying  Mahavira when a Jain closes his eyes and Mahavira comes to him.

Christ doesn’t come to a Hindu; Mahavira doesn’t come to a Christian. Buddha doesn’t come to a Jain: only the image projected in the subconscious will come. 

The image became almost solid. It became so real from constant repetition, from continuous remembering, that it seemed projected deity was standing in from of him. No one was standing there.

Wherever is projected is merely an illusion created out of the consciousness. Any experience is possible only within the domain of the form, time, and space. Whatever belongs to the form, time and space are merely an illusion.  

The illusion is created out of single stuff and that single stuff is the consciousness. The knowledge of the single stuff is Self-knowledge or Brahma Gnana or Atma Gnana.

In reality, consciousness alone exists without the division of the form, time, and space. There is no second here, no other. From the standpoint of the Soul, the form, time and space are merely an illusion. 

The seeker has to take all the facts, and then proceed to examine and analyze, how far is it true?”

To talk of seeking God is as meaningless as saying "seeking dog". It is only a hollow word. one must know God in truth. 

Dualist Sages say: ~   God cannot exist without attributes. Then they are making God as an object whereas God is the subject. Attributes can only be seen in the objective world. Causality appears in the duality, but when one goes deeper into the matter even there the causality disappears.

Who else but the ‘Self’ could have imagined the objective world? Ramanuja and Madva see God as the imaginer, but where is the proof. Nobody has seen God creating. You have seen no other creator, whether God or angel. The only ‘Self’ is left. Therefore ‘Self’ is the creator because imagining means creating. 

The Dvaitins talk nonsense. Has God meaning to you? Yes. It is an idea. What is the idea?  The idea is an imagination. So God has no proved existence beyond that of an idea.

The Brihadaranyaka Upanishad declares: "He who worships the deities as entities entirely separate from him does not know the truth. For the Gods, he is like a pasu (beast)". (1. 4. 10)

The Bhagavad Gita: ~ Brahmano hi pratisthaham ~ Brahman (God in truth) is considered the all-pervading consciousness, 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 which is the basis of all the animate and inanimate entities and material then nothing has to be accepted as God other than consciousness. 

Lord Krishna says Ch ~V: ~ “Those who know the Self 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 Vedas confirms God is Atman (Spirit), the Self.

Rig Veda: ~ The Atman is the cause; Atman is the support of all that exists in this universe. May ye never turn away from the Atman, the Self. May ye never accept another God in place of the Atman nor worship other than the Atman?" (10:48, 5)

The Vedas talk about Brahman (GOD) which refers to the ultimate truth or ultimate reality. Consciousness is the ultimate truth, therefore,  consciousness is Brahman or God in truth.  

Vedas do not permit idol worship. All the idols are of the Puranic Gods Priests are referring to the Puranic Brahma as God they are ignorant of the God in Vedas even though they speak of Vedas. 

Priests do not who understands the meaning of the Brahman, which is present in the form of consciousness.  

The dualistic worship of "God” is only for the ignorant populace. The God in truth is only Atman, the  Self.   In reality,  there is no duality, no differentiation. Only Atman the real exists.  

Remember:~ 

The great mystic who claims to have experienced non-dualistic ecstasy must still come back to a normal state and see the external world, after his ecstasy. And then he will find that the world separates from him because he has ignored it and not tried to understand it.  

Only the Gnani can say of the external world, "This whole universe is Brahman." and prove his statement, that it is none other than the Soul, the Self. 

The yogis are largely self-deluded. Otherwise, they would not set themselves up as different from others. They seek influence over others, or money, by thus differentiating themselves. The Gnani never does this. The yogis promise blessings etc. to those who surrender their wealth or person to them. 

The easiest thing is a physical action. Who is better off--the man who digs the well or calculates? Sitting still is a bodily act. Hence, the true yoga is Gnana yoga has been lost through it is in the hands of the mentally weak.

When a yogi says "I feel Bliss" who is having the experience? His ego. Hence, that is not the highest Gnana. 

That is why Lord Krishna confesses that the oldest wisdom of India (Advaita wisdom) has been lost: people misinterpret and falsify it today as they did then. 

Bhagavad Gita:~It is not yoga but the philosophic truth. But nobody knows it. The teachers of philosophy and leaders of mysticism or religion do not want to inquire into truth and have no time for it. (Gita –Chap- IV-v.2) 

In Gita Chap.IV where Lord Krishna says:~  "This yoga has been lost for ages" the word yoga refers to Gnana yoga, not other yogas: the force of the word this is to point this out. 

Lord Krishna describes some of the other yogas but devotes this chapter separately to Gnana Yoga. So one sees even in those ancient days people did not care for Advaita; they wanted religion; hence, Gnana got lost. That is why Krishna calls it "the supreme secret." Krishna points out that the yoga must-see "Brahman in action." : ~ Santthosh Kumaar