Sonnet 18 is one of the most classical works of Shakespeare’s sonnets. The poem’s beauty lies not only in the structure and rhythm, but also in the meaning it contains ——the praises for friend and the humanism during the Renaissance Period. Sonnet 18 is one of the most classical works of Shakespeare’s sonnets. The poem’s beauty lies not only in the structure and rhythm, but also in the meaning it contains - the praises for friend and the humanism during the Renaissance Period.