Verse 20

सर्वमात्माहमेवेति निश्चयो यो महामते ।तमादाय विषादाय न भूयो याति मे मतिः

In plain words

'All is ātman; I alone am all' — this niścaya, O great of mind: having taken hold of it, my own mind goes no more to sorrow.