In a 1961 speech before the U.N. General Assembly, President John F. Kennedy said, “Mankind must put an end to war — or war will put an end to mankind.” This powerful message was reinforced by the use of epanalepsis, a rhetorical device demonstrated by the word “mankind” repeated at the beginning and end of the sentence. Repetition is a common tactic in speechwriting, poetry, and prose to emphasize certain points and create dramatic effect. Epanalepsis in particular creates a circular flow that brings a complete or whole feeling to a statement.