In comparing verbal language with the language of music, Leonard Bernstein postulated the existence of musical metaphor. One musical composition might be seen as a metaphor for an earlier composition.
In The Unanswered Question – Six Talks at Harvard by Leonard Bernstein (1976) Bernstein analogized linguistics to music to try to discover how music conveys “meaning.” In Lecture 3, Bernstein expounded musical “semantics.” He explored the musical analog of figures of speech: metaphor, ambiguity, simile, antonym, anaphora, chiasmus, asyndeton, “this is like that.”
Perhaps Franz Liszt's late piano composition En Reve (Dreaming) can be seen as a metaphor for Chopin's Berceuse, Op. 57.
Chopin's Berceuse, Op. 57:
In the late 1970s I used to play Liszt's En Reve on the piano. A few nights ago I came across a performance of the piece on YouTube. I hadn't played or heard the piece in all these intervening years. I had a sense of uncanniness listening to it. The piece is a wonderful and magically-nostalgic reverie. Liszt wrote En Reve the year before he died.
Upon listening to the music, I was amazed at how I was still moved by it. How little has changed in my emotional life!