The author's message is ultimately up to the reader to interpret. Repetition, imagery, and symbolism can help to develop the message by emphasizing certain ideas or themes. Repetition can be used to emphasize a particular point or idea, while imagery and symbolism can be used to create a more vivid and meaningful picture of the author's message. Imagery and symbolism can also be used to evoke certain emotions or feelings in the reader, which can help to further develop the author's message.