Verse 120

तन्न किंचिच्च किंचिच्च तत्तदस्तीव नास्ति च ।तत्तद्दृश्यमदृश्यं च तत्तदस्मि न चास्मि च

In plain words

It is nothing at all, and yet it is something; it both exists, as it were, and does not exist; it is both visible and invisible; it is both 'I am' and 'I am not.'