तन्महापातकं हन्ति तमः सूर्योदयो यथा ।अज्ञानाद्ब्रह्मणो ज्ञातमात्माकाशं बुद्बुदोपमम् ॥ १० ॥
In plain words
That knowledge destroys even the gravest sin, the way sunrise destroys the dark. It is ignorance of Brahman, and nothing else, that takes the open sky which is your Self and calls it a bubble.
Close to the Sanskrit
That destroys great sin, as the rising of the sun destroys darkness. Out of ignorance of Brahman, the space that is the Self is taken to be like a bubble.