Bhagavad Gita Chapter 8, Verse 19

भूतग्राम: स एवायं भूत्वा भूत्वा प्रलीयते | रात्र्यागमेऽवश: पार्थ प्रभवत्यहरागमे ||

bhūta-grāmaḥ sa evāyaṁ bhūtvā bhūtvā pralīyate rātry-āgame 'vaśaḥ pārtha prabhavaty ahar-āgame

This multitude of beings, repeatedly born, is helplessly dissolved at the arrival of Brahma's night and comes into being again at the arrival of his day, O Partha.

Krishna emphasizes the helplessness of beings in the cycle: 'Bhutagramah sa evayam bhutva bhutva pralayate'—this (ayam) multitude of beings (bhutagramah), repeatedly born (bhutva bhutva), is dissolved (pralayate). 'Ratryagame 'vashah partha prabhavaty aharagame'—at the arrival (agame) of Brahma's night (ratri), helplessly ('vashah), O Arjuna (partha), they come into being again (prabhavati) at the arrival (agame) of his day (ahar). This verse emphasizes the helplessness: beings are caught in the cycle—they're born, they exist, they're dissolved, they're born again. They have no control over this cycle. This is the nature of material existence: helpless participation in vast cycles. Understanding this emphasizes the importance of liberation—freedom from these helpless cycles. This is why attaining Krishna is important—only He can free you from this helpless cycle.