The poem "A Thing of Beauty is a Joy Forever" by John Keats is extracted from his longer work "Endymion," which is based on Greek mythology.
The rhyme scheme of the poem is aabb, composed of rhyming couplets. While it incorporates various figures of speech such as metaphor and antithesis, the most notable is the epigram. The line "A thing of beauty is a joy forever" serves as a succinct statement that cleverly conveys the enduring nature of beauty.
The key message of the poem is that beautiful things last forever and provide us with immense happiness. They offer unending pleasure and have the power to transform our lives.