I myself had my experience of Nirvana and silence in the Brahman; ... it came first simply by an absolute stillness and blotting out as it were of all mental, emotional and other inner activities. ... I did not become aware of any pure 'I' nor even of any self, impersonal or other - there was only an awareness of That as the sole Reality, all else being quite unsubstantial, void, non-real.

As to what realized that reality, it was a nameless consciousness which was not other than that; one could perhaps say this, though hardly even so much as this, since there was no mental concept of it, but not more. ... Consciousness (not this or that part of consciousness or an 'I' of any kind) suddenly emptied itself of all inner contents and remained aware only of unreal surroundings and of Something real but ineffable.