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 the 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).
Sage Sri, Sankara’s Supreme Brahman (God) is impersonal, Nirguna (without Gunas or attributes), Nirakara (formless), Nirvisesha (without special characteristics), immutable, eternal and Akarta (non-agent). It is above all needs and desires. It is always the Witnessing Subject. It can never become an object as It is beyond the reach of the senses. Brahman is non-dual, one without a second. It has no other beside it. It is destitute of difference, either external or internal. Brahman cannot be described, because description implies distinction. Brahman cannot be distinguished from any other than It. In Brahman, there is not the distinction of substance and attribute. Sat-Chit-Ananda constitute the very essence or Svarupa of Brahman, and not just Its attributes. The Nirguna Brahman of Sage Sri, Sankara is impersonal.
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.