Which device uses contrasting ideas in parallel structure?

Antithesis is a rhetorical device that uses contrasting ideas in balanced phrases or clauses. This creates a parallel structure that highlights the opposition between the ideas, making the writing more impactful and memorable. Antithesis often creates a sense of tension or conflict. It can also be used to emphasize the importance of a particular idea by juxtaposing it with its opposite. Overall, antithesis adds depth and complexity to writing by challenging the reader to consider different perspectives simultaneously.