God is present in the form of the Athma, and it is indeed Athma itself.+

There is neither Shiva nor Shakti but only consciousness. The consciousness is God in truth. All belief-based Gods are not God in truth.

Shiva and Shakti are religious concepts. Whatever is seen, known, believed, and experienced as a person within the dualistic illusion (world) is a falsehood. First, know what God is supposed to be according to your own scriptures.

God is Self-evident. God is not established by extraneous proofs. It is not possible to deny God because God is the very essence of the one who denies it. God is the basis of all kinds of knowledge, presuppositions, and proofs. God is within the universe in which you exist, the God is without the universe in which you exist.

Ish Upanishads: ~ Vidya and Avidya both are hindrances to Self-knowledge, but Vidya is even worse than Avidya. The word Vidya is used here in a special sense; here it means worshipping Gods and Goddesses. By worshipping 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, which is your goal. In the world of Gods and Goddesses, you cannot do that, and thus you go deeper and deeper into the darkness.

Avidya is Karma and therefore, a hindrance. You perform Avidya - i.e., you perform Agnihotra and other sacrifices. This is a roundabout way of purifying the mind, and it is also groping in the dark. But it may not have as heavy a toll on your time and energy as the other. 

Sage Sri, Sankara says: ~ Atman is Brahman. The Atman alone is real and is not religious truth. Sage Sri, Sankara declared this Advaitic truth, which is the ultimate truth to the whole world, many centuries back is the rational truth, scientific truth, and ultimate truth. 

Thus, the Atman which is present in the form of the consciousness is real and eternal, the world in which we exist is merely an illusion. 

Brihadaranyaka Upanishad: ~ Brahman (God in truth) is present in the form of the Athma, and it is indeed Athma itself.

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.

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)

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)

Yajurveda – chapter- 32:~ God is Supreme Spirit has no ‘Pratima’ (idol) or material shape. God cannot be seen directly by anyone. God pervades all beings and all directions. Thus, Idolatry does not find any support from the Vedas.

People, who worship the belief of God, are hallucinating that they become one with such God.

Vedas itself says: May ye never accept another God in place of the Atman nor worship other than the Atman? Thus, to know the real God Self-realization is necessary. Self-realization is God-realization. Self-realization itself is real worship. 

Ishopanishad:~  "They are steeped in ignorance and sunk into the greatest depth of misery who worships the matter, instead of the All-Pervading God and those who worship things born of matter like trees, animals, man, etc. are sunk deeper in misery."

Katha Upanishad says: ~Fools dwelling in darkness but thinking themselves wise and erudite, go round and round, by various tortuous paths, like the blind led by the blind. (Ch II-5 P-14 Upanishads Nikhilananda)

It indicates that the ignorant one (darkness) of the Soul, the innermost Self (Atman) searches for truth by accumulating knowledge of every path and practice and is uncertain about the truth, and thinks every path leads towards reality. The ignorance of the true 'Self' leads one towards unreality or hallucination.

Bhad Upanishad: ~ This Self is dearer than a son, dearer than wealth, dearer than everything else because It is innermost. If one holding the 'Self 'dear were to say to a person who speaks of anything other than the Self as dear, that he, the latter, will lose what he holds dear—and the former is certainly competent to do so—it will indeed come true. One should meditate upon the Self alone as dear. He who meditates upon the Self alone as dear—what he holds dear will not perish. (8-p- -211)

It is the first instance of monism in organized religion. Vedic religion remains the only religion with this concept. To call this concept 'God' would be imprecise. The closest interpretation of the term can be found in the books. 

Tattireya Upanishad (II.1): ~ Where Brahman is described in the following manner: Satyam Jnanam Anantam Brahman - "Brahman is of the nature of truth, knowledge, and infinity". Thus, Brahman is the origin and the end of all things, material or otherwise. Brahman is the root source and Divine Ground of everything that exists and does not exist. It is defined as unknowable and Satchidananda (Truth-Consciousness-Bliss). 

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