Verse 18

स एव चैवं वदति स च वक्तुं न युज्यते ।न तदन्यदिदं तात पश्यात्मानमनामयम्

In plain words

He alone indeed speaks thus, and yet he cannot rightly be spoken of; this is not other than he, dear one -- behold the Self, free of all affliction.