Verse 35

ब्रह्मतत्त्वं विना नेह किंचिदेवोपपद्यते ।खर्वं च खल्विदं ब्रह्मेत्येषैव परमार्थता

In plain words

Apart from the true nature of Brahman, nothing whatsoever is possible here at all. 'And all this is indeed Brahman' — this alone is the highest truth.