p. 290
इदानीं परस्मादेव ब्रह्मणो हिरण्यगर्भायुत्पत्तिं दर्शयति—
In plain words
Now the text explains how Hiranyagarbha arises directly from this very supreme Brahman.
Close to the Sanskrit
Now he shows the emergence of Hiranyagarbha from the supreme Brahman itself.