Final answer:
Sonnets 12 and 60 come from Shakespeare's Sonnets, a collection published in 1609 featuring Shakespearean sonnets with themes ranging from love to mortality.
Step-by-step explanation:
Sonnets 12 and 60 are part of a larger work known as Shakespeare's Sonnets, which is a collection of 154 poems that were first published together in 1609. These sonnets are recognized as Shakespearean sonnets, notable for their structure of three quatrains and a final couplet, adhering to the rhyme scheme abab cdcd efef gg. Within these strict confines, Shakespeare explored themes such as love, beauty, politics, and mortality. Sonnet 12 touches upon the passage of time and its effects, whereas Sonnet 60 delves into the nature of existence itself, comparing life to the waves in the ocean.