Final answer:
Emerson uses the kernel of corn as a metaphor for the potential and growth possible through conscious human effort, symbolizing the interconnectedness and inherent greatness of nature and humanity.
Step-by-step explanation:
The comparison Emerson makes between the kernel of corn and human effort reflects his belief in the potential and power of individual human endeavor. In his writings, he often compares natural elements with human qualities to emphasize the interconnectedness of nature and humanity and the divine potential within every person. For instance, Emerson's view is that just as a single kernel of corn holds the potential to grow and multiply under the right conditions, so too does each individual hold the potential to grow and contribute to the greater good through conscious, intentional human effort. This metaphor highlights not just the importance of individual contributions but also the idea that greatness and productivity are inherent in all natural things, including humans.