Overall, the structure and use of metaphors are two connected entities toward the overall progression within the sonnet. Seen as a harsh critic on age, Shakespeare sets up the negative effects of aging in the three quatrains of this poem. These aspects not only take on a universal aspect from the symbols, but represent the inevitability of a gradual lapse in the element of time in general from their placement in the poem. Further, many of the metaphors utilized in this sonnet were personified and overwhelmed by this connection between the speaker's youth and death bed.