Bhagavad Gītā Chapter Two verse 69

yā niśā sarvabhūtānāṃ tasyāṃ jāgarti saṃyamī |
yasyāṃ jāgrati bhūtāni sā niśā paśyato muneḥ ||

sarva - whole, entire, all, every one; altogether, wholly, completely, in all parts, everywhere

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.”