Dream of Butterfly

I often dream of turning and turning on the roof at midnight while listening to the Butterfly.
Nobody can hear it around but me. I get lost by the inspiration feeling and huge joy and comfort…
However, I am still here, sticking to me, what am I? Am I this nobody who does not know anything, who cannot trust any fact, who sometimes even does not understand the existence of its own, even the meaning of existence…?
Or the one who is free, who is empty of thoughts, empty of doubts..
Well I guess optimistically, my existence is a kind of being just as a chord of a rhythmic song-a part of entire existence- and NOTHING at the same time.
OK, anybody could tell me what Nothing means?
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