Notions such as 'Shunyata' (Void) or 'Fanaa' (annihilation) are purely imaginary nd delusion-inducing. To say that 'nothingness' exists or is a valid experience to be had consciously is a proposition too absurd and nonsensical to merit any reasoned refutation. How can consciousness emerge out of nothingness? And as far as all those who speak of the Ultimate as 'Shunya' or 'fanaa' are concerned, they are surely not speaking from a void or a nothingness bereft of consciousness. If they claim to speak from a nothingness, it is a ludicrous claim. If they claim to have returned from a 'nothingness' to speak, it's even more ridiculous. How can that into which a conscious entity can merge and from which it can emerge ever be 'nothingness'? Consciousness can only merge into a still deeper awareness. Dissolution pertains to a merger of the individuated consciousness into infinite awareness and never any non-being. All talk of void or shunyata is specious and imaginary and to be completely refuted by every genuine seeker, in whichever scripture it may happen to appear. All who speak of 'nothingness' speak from a plane of confounding speculation and constrained imagination. And all speculation and imagination happens in consciousness.Thus the very idea of 'nothingness' is rooted in consciousness. And that's what it is. A delusional idea!
To say that the densest point of Big Bang or the minutest zygote or seed is empty or 'nothingness' is again absurd. To say that the pure awareness which transcends the vibrations is void is also absurd for no emergence from or merger into a void is ever possible.
To quote from the Spanda Karika (Stanzas on Vibration), a beautiful flowering of Kashmir Shaiv mysticism,
12. Nothingness can never be an object of contemplation because consciousness is absent there.( It is a mistake that one has perceived nothingness) because when reflection (subsequently) intervenes, one is certain that "IT WAS".
13. Therefore consider that to be an artificial state similar to deep sleep. That principle( awareness) is forever perceived and not remembered in this way( as a memory of 'nothingness').
23-24. Once the Yogi enters That State which he takes as His support and firmly resolves that 'I will surely do whatever He says,' both the sun and the moon set, following the ascending way, inot the channel of Sushumna, once the sphere of the universe is abandoned.
25. Then in that Great Sky( of Awareness), when the sun and the moon dissolve away. THE DULL MINDED YOGI IS CAST DOWN INTO A STATE LIKE THAT OF DEEP SLEEP. THE AWAKENED HOWEVER REMAINS LUCID.
The last verse clarifies everything. Nothingness is the casting down of the dull yogi into deep slumber and not any valid experience. The adept does not swoon but goes deeper and still deeper into ever vibrant awareness. Thus Awareness is Real while nothingness is a stupor which appears in awareness due to dullness of the seeker.
To inhere in Awareness is sadhana and all talk of 'nothingness' is a delusion and an obstruction.