yā niśā sarva-bhūtānāṁ tasyāṁ jāgarti saṁyamī
yā niśā sarva-bhūtānāṁ tasyāṁ jāgarti saṁyamī |
yasyāṁ jāgrati bhūtāni sā niśā paśyato muneḥ ||
(Śrīmad Bhagavad-gītā: 2.69)
“One who is well regulated is awake
In regard to that which is night for all beings.
That in which [all] beings are awake
Is night for a seeing sage.”