Dr. King used numerous of repetition in his speech. for example he repeated 'I have a dream one day.... " a number of times. He was saying this over and over to prove a point that his dream is essential and that he is expanding for rights. He kept mentioning to his supporters that his dream was for their rights and he standing up for them. another example was at the end of the speech he kept stating " Let freedom ring from...", it shows he is determined and that freedom should expand. It also shows that he is brave and a hero and by using repetition, he is serious and motivating, and determined to stand up for what was right.
Additionally, Dr. King. used word choice. The diction he used in his speech created a significance in the text For example he stated "I have a dream that one day, down in Alabama, with its vicious racists, with its governor having lips dripping with the words of interposition and nullification" quote was a powerful example of diction. This shows how serious he is about the statement he is making. He used essential vocabulary and chose his words wisely. He went deeper into the situation by the words in his speech. This shows that he had a strong voice and he is intelligent.