Anaphora is a rhetorical device that involves the repetition of a word or phrase at the beginning of successive clauses or sentences. This technique is often used to create emphasis, rhythm, and emotional impact in writing and speech. For example, in Martin Luther King Jr.'s famous "I Have a Dream" speech, the repeated phrase "I have a dream" reinforces his vision for equality and justice. Anaphora can be found in various forms of literature, poetry, and speeches. It helps to unify ideas and make them more memorable for the audience. By repeating key phrases, writers and speakers can draw attention to important themes and enhance the overall effectiveness of their message.