Shakespeare's Sonnet 21 appears to mock the exaggerations which were common in love sonnets of his time. Its theme is very similar to that of his Sonnet 130. The poet says his loved one is as fair as anyone who has lived - but is of human beauty only: not that of the phenomena unrealistically evoked by other poets.
His message is summarised in the sonnet's concluding couplet, which may be rendered in modern English as follows:
Let them hype up, who love a story's telling:
I'll make no pitch on things which need no selling.
Read more on this and his other sonnets in Shakespeare: a Hidden Life Sung in a Hidden Song (see link below).
Every sonnet has a different theme.
The theme of the Sonnet 32 by Shakespeare was "handsome youth."
hopeless love
Hopeless love
The first section of a sonnet, known as the octave, typically sets the theme by presenting the problem or question that the poet explores. It consists of the first eight lines of the sonnet.
Sonnet is the genre defined by form rather than theme. A sonnet is a poetic form with specific characteristics such as 14 lines, a specific rhyme scheme, and a fixed structure. The theme of a sonnet can vary widely, but the form remains consistent.
Love. Nostalgy.
The theme of a sonnet typically revolves around love, nature, time, beauty, or mortality. Sonnets often explore complex emotions or convey deep philosophical reflections within strict structural constraints.
The form of a sonnet, with its strict structure and rhyme scheme, can contribute to the development and exploration of the theme. The limited number of lines forces the poet to be concise and precise in their expression, allowing for a focused exploration of the theme within a controlled framework. Additionally, the volta or thematic shift in the sonnet's structure can emphasize the contrast or resolution related to the theme.
The theme of Shakespeare's Sonnet 116 is that true love should overcome and outlast any obstacle.
it is a shakesperian sonnet ie. it has a specific rhyme scheme and a rhyming couplet at the end which stands out bringing a slight change in the poem's theme, tone or even setting
The theme of Shakespeare's Sonnet 106 is the immortality of poetry and how it can outlive physical beauty and time. The poet reflects on the power of his verses to immortalize the beauty of the beloved, ensuring that their memory will endure through the generations.