During Christine's childhood

During Christine's childhood, which is described retrospectively in the early chapters of the book, her father tells her many stories featuring an Angel of Music, who, like a muse, is the personification of musical inspiration.

On his deathbed

On his deathbed, Christine's father tells her that from Heaven, he will send the Angel of Music to her.

Christine's career

Christine is eventually given a position in the chorus at the Paris Opera House.