Bhagavad Gītā Chapter Two verse 69
yā niśā sarvabhūtānāṃ tasyāṃ jāgarti saṃyamī |
yasyāṃ jāgrati bhūtāni sā niśā paśyato muneḥ ||
Commentaries and Reflections
Commentary by TKV Desikachar:
What is darkness for some people is light for others.
What is light for some people is darkness for others.”