Cassandra has been used as a metaphor and allegory in psychological and philosophical tracts. Some scholars think this is a metaphor rather than a literal belief. These messages can be explicit, or implied through metaphor or symbolism. There is a similar problem with the terms simile and metaphor. Hillman sees the soul at work in imagination, fantasy, myth and metaphor. But this is merely one of many interpretations of the metaphor of Dracula. Metamorphosis serves as perhaps more than a metaphor for such transformations. He uses images of nature as a constant metaphor. Other examples of metonym and metaphor overlap are found in biblical literature. Instead, he focused on musical interpretation with a combination of anecdote, metaphor, and wit. It embodies blues as a metaphor and form. The Chinese Buddhist "mind monkey" metaphor refers to the unsettled, restless state of human mind. He also criticizes the song for "forgoing metaphor or ambiguity or impressionism". Their approach is rooted in scientific community metaphor. They use weaving as a metaphor because it denotes connection.