What role do couplets play in poetry?

Couplets are pairs of lines in a poem that often rhyme and typically have the same meter. They can serve various functions in poetry, one of which is enhancing mood and clarifying themes. When couplets are incorporated into a poem, they can create a sense of unity and reinforce ideas through repetition and rhyme. The paired nature of couplets allows poets to juxtapose contrasting ideas or to build upon a single theme, thereby deepening the emotional impact of the poem.

For example, a couplet can encapsulate a particular feeling or thought succinctly, leaving the reader with a memorable image or insight that reinforces the poem's overall message. This ability to enhance mood and clarify themes makes couplets an effective tool for poets looking to convey their expression powerfully and clearly.