Verse 50

अकर्मकर्तृकरणमकारणमनामयम् ।स्वयंप्रभुं महात्मानं ब्रह्म ब्रह्मविदो विदुः

In plain words

Without action, agent or instrument; without cause; free of affliction; self-sovereign, the great self -- thus the knowers of Brahman know Brahman.