Parallelism is a device which suggests a connection, simply because the form of one sentence or clause repeats the form of another. This is often used in speeches, prayers, poetiy, and advertisements. It can have a powerful emotional effect. Parallelism, which suggests a connection of meaning through an echo of form, doesn’t have to be grammatical parallelism. It may be phonic parallelism: as in the rhyme, rhythm, and other sound effects of verse.