Illustrative image: A song can carry one meaning on its surface and another through metaphor, memory, and imagination.
What happens when a songwriter describes a bird but is really talking about a person? Or when a broken window becomes an image of emotional separation, a road becomes a symbol of freedom, and winter begins to mean something more intimate than cold weather?
The listener hears a familiar object, but gradually recognizes an unfamiliar truth inside it. This is one of the most fascinating possibilities of lyrical language: a song can appear to describe one thing while quietly communicating another.