I know this song is about a book, but it has its own meaning as a particular song, despite the book it's based on.
To me, this song says that sometimes something that seems good may not be. In fact, may be no good at all. For example: you're living a comfortable and peaceful life and you won the lottery. Maybe this, that you can call a miracle too good to be true, ends up with the comfortable and peaceful life you were living and you can be miserable.
Just an example and has happened. This can apply to many different situations in life.
I know this song is about a book, but it has its own meaning as a particular song, despite the book it's based on. To me, this song says that sometimes something that seems good may not be. In fact, may be no good at all. For example: you're living a comfortable and peaceful life and you won the lottery. Maybe this, that you can call a miracle too good to be true, ends up with the comfortable and peaceful life you were living and you can be miserable. Just an example and has happened. This can apply to many different situations in life.