Sometimes authors want to emphasize a concept, and deliberate repetition is the way to do it. Some of my favorite authors use the repetition of certain key words and phrases to highlight an idea or to show the scene. This technique is an accepted rhetorical device and is commonly found in mainstream fiction and in poetry. It is used to evoke an emotional response in the reader and can be exceedingly effective when done right.
Literarydevices.net says, “The beauty of using figurative language is that the pattern it arranges the words into is nothing like our ordinary speech. It is not only stylistically appealing, but it also helps convey the message in a much more engaging and notable way. The aura that is created by the usage of repetition cannot be achieved through any other device.”
Repetition as a literary device can take these forms: