It is not possible to deny consciousness because it is the very essence of the one who denies it.+

The final state is that consciousness is everything, the whole; there is no second thing that exists other than consciousness, whereas to say, "God is in me" is mysticism. Consciousness is God is the rational truth, scientific truth, ultimate truth, and universal truth.

Atmic bliss is non-dualistic awareness; there is no enjoyer present to enjoy it or to distinguish it from misery. The yogi revels only in 'bliss' that is experienced i.e. that comes and goes, but his experience is not Gnanic his experience of bliss is limited to physicality. All chakra-based bliss is within the domain of physicality.

Atmic peace will be disturbed only if one recognizes a second. Hence, the yogic peace is temporary: the only enduring peace belongs to the sages of truth for it is non-dual.

Dualists could not distinguish between the ‘I’ and the invisible witness. They take the ‘I’ as the ‘Self’ or the witness. Their highest is to say I AM THAT without verification. Dualists are so attached to the 'I' that they do not want to think that 'I' itself is an illusion. Again, one is unable to detach the ‘I’ from the real witness, which is ever formless. Dualists foolishly hold that the “I” persists in deep sleep, but they cannot prove it.

Sage Sankara: ~VC~Uf the universe is true, let it then be perceived in the state of deep sleep also. As it is not at all perceived, it must be unreal and false like dreams.

Remember:~

There is no second thing that exists prior to consciousness. The ‘I’ ceases to exist without consciousness. The Soul, which is present in the form of consciousness, is the ultimate truth or Brahman.

That is why Bhagavad Gita: ~ The permanent (consciousness) is always there, only the transient ‘I’ comes and goes. (2.18)

The ‘I’ hides the Souk, the Self, which is the cause of the 'I'. 

Even the Bhagavad Gita says: ~ 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.

Consciousness is ever-present. Without consciousness, the world, in which you exist ceases to exist. Consciousness is Self-evident.  It is not established by extraneous proofs. It is not possible to deny consciousness because it is the very essence of the one who denies it. 

Consciousness is the basis of all kinds of knowledge, presuppositions, and proofs. Consciousness is everything. Thus, consciousness is the ultimate truth or Brahman. : ~Santthosh Kumaar