Sri Aurobindo
Letters of Sri Aurobindo
CWSA 35
Fragment ID: 8590
Nirvana and the Brahman [9]
I myself had my experience of Nirvana and silence in the Brahman, etc. long before there was any knowledge of the overhead spiritual planes; it came first simply by an absolute stillness and blotting out as it were of all mental, emotional and other inner activities – the body continued indeed to see, walk, speak and do its other business but as an empty automatic machine and nothing more. 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 realised that Reality, it was a nameless consciousness which was not other than That;1 one could perhaps say this, though hardly even so much as this, since there was no mental concept of it, but no more. Neither was I aware of any lower soul or outer self called by such and such a personal name that was performing this feat of arriving at the consciousness of Nirvana. Well then, what becomes of 
your pure “I” and lower “I” in all that? 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. You may say that there must have been a consciousness aware of some perceiving existence, if not of a pure “I”, but, if so, it was something for which these names seem inadequate.
22 July 1937
1 Mark that I did not think these things, there were no thoughts or concepts nor did they present themselves like that to any Me; it simply just was so or was self-apparently so. – Sri Aurobindo