ब्रह्मैवाज्ञातमज्ञत्वमभ्यागतमिव स्थितम् ।तथा हि दृश्यते स्वप्ने चेतसात्मात्मनात्मनः
In plain words
Brahman itself, unknown, stands as if it had fallen into a state of not-knowing -- for thus indeed, in a dream, it is seen: the Self, by the Self, through the citta, upon the Self.