Kindly consider the question: what would your good do if evil did not exist, and what would the
earth look like if shadows disappeared from it? Shadows are cast by objects and people. Here is the
shadow of my sword. Trees and living beings also have shadows. Do you want to skin the whole
earth, tearing all the trees and living things off it, because of your fantasy of enjoying bare light?
You're a fool.

Author: Mikhail Bulgakov