King uses repetition to point to critical points such as freedom and racial equality, for example, when he says, "Let freedom ring" and "But a hundred years later the Negro is not free ". Repetition is effective in providing a memorable and lasting effect on the audience. King uses allusion to past statements, speeches, and folklore to connect all races when delivering his speech as a way to reinforce his main message of freedom and racial equality. He also uses personification to denote that African Americans are not fighting against an individual, but against a system of segregation. The use of personification is effective in making the system under discussion interesting and creating a need to understand how it works. In a considerable list of rhetorical devices used, King uses euphemism in his speech to show the extent of the problems and dissatisfaction suffered by African Americans. For example, he calls the situation in America then “shameful conditions” and “unspeakable horrors” under the police. Here the euphemism has been used to criticize and define the situation as such