The document discusses the rhetorical device of antithesis. Antithesis involves juxtaposing two opposing or contrasting ideas in balanced phrases or sentences. It can highlight a point by showing its opposite, jar a reader by breaking patterns, or express complex ideas through contrasts in language. Famous examples from literature and speeches use antithesis powerfully by opposing key words, clauses, or entire sentences. Antithesis has a natural appeal as it organizes thoughts in a way that people find evocative.