I surched in Wikipedia:
Hiranyagarbha means: the 'golden fetus' or 'golden womb' which is the source of the creation of the Universe or the manifested cosmos
The Hiranyagarbha Sukta of the Rig Veda declares that God manifested Himself in the beginning as the Creator of the Universe, encompassing all things, including everything within Himself, the collective totality, as it were, of the whole of creation, animating it as the Supreme Intelligence.
Can you imagine ???