Śrīmad-Bhāgavatam · Text 12.7.12
Who is speaking and story frame
पुरुषानुगृहीतानामेतेषां वासनामय: ।
विसर्गोऽयं समाहारो बीजाद् बीजं चराचरम् ॥ १२ ॥
puruṣānugṛhītānām
eteṣāṁ vāsanā-mayaḥ
visargo ’yaṁ samāhāro
bījād bījaṁ carācaram
The secondary creation, which exists by the mercy of the Lord, is the manifest amalgamation of the desires of the living entities. Just as a seed produces additional seeds, activities that promote material desires in the performer produce moving and nonmoving life forms.
Read the purport on Vedabase.ioFrom Canto 10, chapter 14 onward, the translation and purports were completed by Śrīla Prabhupāda's disciples after his departure, and published by the Bhaktivedanta Book Trust.