Verse 53

चेत्येन रहिता यैषा चित्तद्ब्रह्म सनातनम् ।चेत्येन सहिता यैषा चित्सेयं कलनोच्यते

In plain words

This same cit, when free of the cetya, is that eternal Brahman. This same cit, when joined with the cetya, is called this kalanā.