यथोर्णनाभिः सृजते गृह्णते च यथा पृथिव्यामोषधयः संभवन्ति ।यथा सतः पुरुषात्केशलोमानि तथाऽक्षरात्संभवतीह विश्वम् ॥ ७ ॥
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
As a spider sends out its thread and draws it back, as plants arise from the earth, and as hair grows from a living Puruṣa, so here the universe arises from Akṣara.