The central idea of "This Is My Letter to the World" is that the truth and beauty of nature cannot be doubted.
We can reach this answer because:
- The poem shows how the speaker is someone isolated, who wanted to communicate with the world.
- However, the world does not seem to want to establish this communication.
- Because of this, the speaker tries to forget her frustration when observing the beauty and truth of nature.
According to the speaker, communication between the world is a questionable thing, but the beauty and truth of nature are something that cannot be doubted.
It is important to emphasize that the central idea of a poem is the subject that the poem is promoting.
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