Verse 13

सर्वगं सर्वदेहस्थं सर्वकालमयं महत् ।केवलं परमात्मानं चिदात्मैवेह संस्थितः

In plain words

All-pervading, dwelling in every body, made of every time, vast, alone -- it is the ātman that is cit alone, the supreme ātman, that stands established here.