Verse 27

सर्वं प्रशान्तमजमेकमनादिमध्य-माभास्वरं स्वदनमात्रमचेत्यचिह्नम् ।सर्वं प्रशान्तमिति शब्दमयी तु दृष्टि-र्बोधार्थमेव हि मुधैव तदोमितीदम्

In plain words

All is utterly at peace — unborn, one, without beginning or middle, radiant, mere relishing, bearing no mark that could make it an object of thought. Yet "all is at peace" is a view made of words, meant solely for awakening; in itself it is idle. This is "Oṃ."