In order for a poem to be classified as a sonnet, it must meet certain structural requirements, and Sonnet 138, "When my love swears that she is made of truth," is a perfect example. Shakespeare employs the traditional rhyme scheme of the English sonnet, the poem is made up of three quatrains and a rhyming couplet, and iambic pentameter is the predominant meter. However, it would be an error to approach this poem as a traditional Shakespearean love sonnet. It is a ‘love’ poem in the sense that a relationship between two lovers is the central theme, but the reader is offered a somewhat unexpected viewpoint. The stylistic constraints of the sonnet form are extremely advantageous