Śrīmad-Bhāgavatam · Text 11.7.49
Who is speaking and story frame
कालेन ह्योघवेगेन भूतानां प्रभवाप्ययौ ।
नित्यावपि न दृश्येते आत्मनोऽग्नेर्यथार्चिषाम् ॥ ४९ ॥
kālena hy ogha-vegena
bhūtānāṁ prabhavāpyayau
nityāv api na dṛśyete
ātmano ’gner yathārciṣām
The flames of a fire appear and disappear at every moment, and yet this creation and destruction is not noticed by the ordinary observer. Similarly, the mighty waves of time flow constantly, like the powerful currents of a river, and imperceptibly cause the birth, growth and death of innumerable material bodies. And yet the soul, who is thus constantly forced to change his position, cannot perceive the actions of time.
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.