आयातासु गतासु शैशवमुखावस्थासु जाग्रन्मुखा -स्वन्यास्वप्यखिलासु वृत्तिषु धियो दुष्टास्वदुष्टास्वपि ।गङ्गाभङ्गपरम्परासु जलवत्सत्तानुवृत्तात्मन -स्तिष्ठत्येव सदा स्थिराहमहमित्येकात्मता साक्षिणः ॥ ६१४ ॥
In plain words
As childhood and other stages of life come and go, through all the fluctuating states of the mind whether pure or troubled—just as water persists through the rolling waves of the Ganges—the steady, unchanging oneness of the witness shines forever as the unbroken sense of 'I am, I am'.
Close to the Sanskrit
As childhood and other states come and go, in waking and other mental modifications whether pure or impure, like water in the continuous waves of the Ganges, the steady oneness of the witness whose existence continues always remains indeed as 'I, I'.