यः सर्वज्ञः सर्वविद्यस्य ज्ञानमयं तपः ।तस्मादेतद्ब्रह्म नाम रूपमन्नं च जायते ॥ ९ ॥
The world arises from the imperishable the way a thread arises from a spider — out of it, not out of anything brought to it.The three similes are set against the causal sequence they illustrate. What all three share is that nothing is fetched from outside, which is why they are the similes chosen and not others.
In plain words
From that One who knows all in general and every particular, whose Tapas consists wholly of Jñāna, arise this Brahma—Hiraṇyagarbha—name, form, and Anna.