Shakespeare's Sonnets 5 and 6 address themes of procreation, the passage of time, beauty, love and mortality. Both sonnets try to convince a handsome young man to marry and have children so that his beauty is not lost when he dies. Sonnet 6 expands on Sonnet 5's theme of preserving beauty in a more dramatic tone, as the young man's linear life will end while nature's seasons are cyclical. The sonnets employ rhetorical techniques and metaphor to parallel the themes of impermanence and the need to pass on one's beauty through offspring.