Verse 3

सबाह्याभ्यन्तरं सर्वं चिदेव परमार्थतः ।अस्ति चिद्व्यतिरेकेण नेह किंचन कुत्रचित्

In plain words

All of it, its outside and its inside together, is in ultimate truth cit alone; apart from cit nothing whatsoever exists here, anywhere.