Bhagavad Gita Chapter 8- Akshara Brahma Yoga - Sloka 18

The entire content of this mail is from Swami Chidbhavananda's translation of The Bhagavad Gita, published by Ramakrishna Mission

Brahma, the Creator's Standard of Time 17-19

1 Gita Sloka  every day - Chapter 8 - Akshara Brahma Yoga - Sloka 18

 Brahma on Nabhi kamalam

Avyakta vyaktayah sarvah prabhavanti ahah agame I

ratri agame praliyante tatra eva avyakta samjnake II sloka 18

अव्यक्त व्यक्तयः सर्वः प्रभवन्ति अहः आगमे I

रात्रि आगमे प्रलीयन्ते तत्र एव अव्यक्त संज्ञके II श्लोक 18

At the coming of the day all manifest beings proceed from the unmanifested, and at the coming of night they merge again in the same which is called the unmanifested.

The plan of nature is the same both in the microcosm and macrocosm. In accordance with it, when a jivatman goes to sleep,  the world projected from his mind gets withdrawn into it. The manifest and unmanifest states of his world are all related to the wakefulness or otherwise of his mind. Similarly the macro-cosmos comes into being when Brahma wakes up and it helplessly vanishes into the unmanifested state when he goes to sleep. His day and night function on a universal basis. Creation, preservation and destruction of the universe are all contained in the states of the mind of the Brahma. And this is an eternal cosmic play.