I hate it when people start talking about that stupid multiverse theory. (Which is an idiotic theory because it’s inherently unfalsifiable and unverifiable-it’s less scientific than believing in God. Much less.) I just heard some of that claptrap and suddenly have a theory that people with mood disorders like depression feel bad because terrible shit is happening to our counterparts in other universes.
Might be a good premise for a work of fiction, if the reader can suspend their disbelief enough to forget what people today know about the neurological causes of these disorders.