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From the Unmanifested all the manifested (worlds) proceed at the coming of the 'day'; at the coming of the 'night' they dissolve verily into ï1thatï1 alone which is called the Unmanifested.

At the coming of that day, all manifest things arise from the unmanifest; at the coming of night they dissolve into that same thing called the unmanifest.

With the dawn of Brahma's day, all manifest things arise from the unmanifest (avyakta); with the coming of his night, they dissolve back into that same unmanifest. The unmanifest here is the subtle source from which the visible world unfolds and into which it returns. The verse describes creation and dissolution as a rhythm, like breathing, rather than as a single event. Everything that appears is part of this rhythm and has no permanent standing of its own.