प्रकृतिं स्वामवष्टभ्य विसृजामि पुनः पुनः। भूतग्राममिमं कृत्स्नमवशं प्रकृतेर्वशात् ॥

prakṛitiṁ svām avaṣhṭabhya visṛijāmi punaḥ punaḥ bhūta-grāmam imaṁ kṛitsnam avaśhaṁ prakṛiter vaśhāt

Hidden in Nature, which is mine own, I emanate again and again all this multitude of beings, helpless, by the force of Nature.

In plain words: Krishna says he uses his own nature to bring all beings into existence, over and over. The beings have no control over this, because the forces of nature carry them along.