Sadness does something to the way we see the world. In the experience of deep sadness, the world itself seems altered in some way: colored by sadness, or disfigured by it. Rather than living inside us, as our normal passions do, our sadness seems to envelop everything: we live inside it, as if it were a cocoon or a prison. At such times, we seem particularly aware of the world as a world, as a place where we have to live.
Cold World: The Aesthetics of Dejection and the Politics of Militant Dysphoria by Dominic Fox