Sonnet
It was, however, Sir Philip Sidney's sequence "Astrophel and Stella" (1591) that started the English vogue for sonnet sequences. The next two decades saw sonnet sequences by William Shakespeare, Edmund Spenser, Michael Drayton, Samuel Daniel, Fulke Greville, William Drummond of Hawthornden, and many others. These sonnets were all essentially inspired by the Petrarchan tradition, and generally treat of the poet's love for some woman, with the exception of Shakespeare's sequence of 154 sonnets. The form is often named after Shakespeare, not because he was the first to write in this form but because he became its most famous practitioner. The form consists of fourteen lines structured as three quatrains and a couplet. The third quatrain generally introduces an unexpected sharp thematic or imagistic "turn", the volta. In Shakespeare's sonnets, however, the volta usually comes in the couplet, and usually summarizes the theme of the poem or introduces a fresh new look at the theme. With only a rare exception (for example, Shakespeare's Sonnet 145 in iambic tetrameter), the meter is iambic pentameter.
Sonnet 147
Sonnet 147 is one of 154 sonnets written by English playwright and poet William Shakespeare. Sonnet 147 is written from the perspective of a poet who regards the love he holds for his mistress and lover as a sickness, and more specifically, as a fever. The sonnet details the internal battle the poet has between his reason (or head) and the love he has for his mistress (his heart). As he realizes his love is detrimental to his health and stability, perhaps even fatal, the poet's rationality attempts to put an end to the relationship. Eventually, however, the battle between the poet's reason and his love comes to an end. Unable to give up his lover, the poet gives up rationale and his love becomes all consuming, sending him to the brink of madness.