Sonnet 23 and then his collection of poems to a play. Sonnet 23 is considered an English or Shakespearean Sonnet. It contains 14 iambic pentameter lines. The rhyme scheme is "abab cdcd efef gg". The form consists of three quatrains and a couplet. All of the lines, including the fifth line are examples of iambic pentameter: After the octave (the first two quatrains) there is often a change referred to as a volta. In Sonnet 23 the volta is line nine's suggestion. "For fear of trust" has drawn different, though not necessarily contradictory, glosses. Nicolaus Delius has it "from want of self-confidence,"
Sonnet introduced, such as CDCDCD. Petrarch typically used an ABBA ABBA pattern for the octave, followed by either CDE CDE or CDC CDC rhymes in the sestet. The symmetries (ABBA vs. CDC) of these rhyme schemes have also been rendered in musical structure in the late 20th century composition "Scrivo in Vento" by Elliott Carter, inspired by Petrarch's Sonnet 212, "Beato in Sogno".) In English, both the English or Shakespearean sonnet, and the Italian Petrarchan sonnet are traditionally written in iambic pentameter. The first known sonnets in English, written by Sir Thomas Wyatt and Henry Howard, Earl of Surrey, used the