Verse 27

नभसोऽप्यधिकं शून्यं नच शून्यं चिदात्मकम् ।सूर्यकान्ते यथा वह्निर्यथा क्षीरे घृतं तथा

In plain words

It is emptier even than the sky, and yet it is not empty, for its very self is cit -- as fire lies within the sun-crystal, as ghee lies within milk.