Verse 43

कदाचिदम्बरे शुद्धे मनस्तत्त्वानुरञ्जनात् ।सौवर्णं ब्रह्मगर्भं च स्वयमण्डं प्रवर्तते

In plain words

Sometimes, in the pure ether, through the tinging of the mind-principle, a golden egg, with Brahmā as its embryo, arises of itself.