Srimad Bhagavad Gita -Ramanujacharya 75

Srimad Bhagavad Gita -Ramanujacharya

Chapter-2 Sankhya Yogaḥ

yā niśā sarva bhūtānāṁ tasyāṁ jāgarti saṁyamī | yasyāṁ jāgrati bhūtāni sā niśā paśyato muneḥ || 69 ||  69. The self-controlled one is awake during what is night for all beings, when all beings are awake, that is the night to the enlightened one. Commentary The enlightened mind which is centred on the ātman is like night — dark and obscure for all other beings. One who has subdued the senses and is serene, is awake to the nature of the ātman; that is — fully enlightened. All beings are "awake" — ie. actively interacting with the objects of the senses like sound and the rest. But such sense awareness is like night — obscure to the enlightened one who has realised the Self.