“And when it's completely dark, your body and your shadow can rest to-gether. But a person and his shadow are never pulled apart. Shadows are always there, whether you can see them or not.
"Does the shadow help the person in some way?" you asked.
"I don't know," I said.
"Then why doesn't everyone get rid of them?"
"They don't know how to. But even if they did, I doubt anyone would discard their shadow.”
"How come?"
"Because people are used to them. Whether they serve any purpose or not.”
―
Haruki Murakami,
The City and Its Uncertain Walls