nityadā - constantly; hi - indeed; aṅga - My dear Uddhava; bhūtāni - created bodies; bhavanti - come into being; na bhavanti - go out of being; ca - and; kālena - by time; alakṣya - imperceptible; vegena - whose speed; sūkṣmatvāt - because of being very subtle; tat - that; na dṛśyate - is not seen.

My dear Uddhava, material bodies are constantly undergoing creation and destruction by the force of time, whose swiftness is imperceptible. But because of the subtle nature of time, no one sees this.