It’s a form of communication that reaches us more fundamentally than words. I imagine it’s like animal sounds - what does a dog’s bark mean to another dog? Probably the same thing as when you tell someone “Stop!” or “Hey!” really loud. It don’t carry a concrete meaning, but feeling. Music is taking that and turning it into language. It can have many different meanings and tell many different stories, even without lyrics. Although it’ll never be as exact as written words, we can still enjoy the story.