What might Thoreau mean by the “indescribable innocence and beneficence of nature” in Thoreau’s Walden(1854) from The Humanistic Tradition 7 ed.

READ the excerpt from Thoreau’s Walden(1854) from The Humanistic Tradition 7 ed.
The write 150-200 words to the following question providing specific examples to support the answers.

Was Thoreau’s retreat to Walden Pond an adventure in practical survival or an extended mystical experience?
What might Thoreau mean by the “indescribable innocence and beneficence of nature”?