Final answer:
The central idea of the essay is that true success comes from being in harmony with nature.
Step-by-step explanation:
The central idea of the essay can be found in the sentence:
Success, therefore, puts humans as a part of nature, not apart from nature. Anything else is failure. The closer we are to nature, the more likely we are to succeed.
This sentence emphasizes that true success is achieved by embracing our connection to nature and not trying to separate ourselves from it. It suggests that being in harmony with nature is essential for success.