Verse 12

अन्तरात्मप्रकाशस्य स्वतो यदवभासनम् ।तदहंतादि चित्त्वादि जीव इत्येव वेद सः

In plain words

The shining-forth that belongs, of itself, to the light of the inner Self — that is "I"-ness and the rest, the fact of being cit and the rest; and that one knows it simply as "jīva."