It is the datkness that hide’s what you dont want to be noticed .

It is the darkness that let one pop up what is to remain an unseen phenomena hence what is buried as seed pops at night in to a leafy turn thus a petal that turn at night in to flower.
It is the darkness that rest eyes @nd psyche hence gives a glimpse of shade to soothe your mind for a while as serenity.

Its the creation of God not unnessesarily .(Dr Raza)