Thoreau needed to concentrate and get himself working more on his writing. In March 1845, Ellery Channing told Thoreau, "Go out upon that, build yourself a hut, & there begin the grand process of devouring yourself alive. I see no other alternative, no other hope for you." Two months later, Thoreau embarked on a two-year experiment in simple living on July 4, 1845, when he moved to a small, self-built house on land owned by Emerson in a second-growth forest around the shores of Walden Pond. The house was in "a pretty pasture and woodlot" of 14 acres that Emerson had bought, from his family home.
On July 24 or July 25, 1846, Thoreau ran into the local tax collector, Sam Staples, who asked him to pay six years of delinquent poll taxes. Thoreau refused because of his opposition to the Mexican-American War and slavery, and he spent a night in jail because of this refusal. (The next day Thoreau was freed, against his wishes, when his aunt paid his taxes.) The experience had a strong impact on Thoreau. In January and February 1848, he delivered lectures on "The Rights and Duties of the Individual in relation to Government" explaining his tax resistance at the Concord Lyceum. Bronson Alcott attended the lecture, writing in his journal on January 26:
Heard Thoreau's lecture before the Lyceum on the relation of the individual to the State— an admirable statement of the rights of the individual to self-government, and an attentive audience. His allusions to the Mexican War, to Mr. Hoar's expulsion from Carolina, his own imprisonment in Concord Jail for refusal to pay his tax, Mr. Hoar's payment of mine when taken to prison for a similar refusal, were all pertinent, well considered, and reasoned. I took great pleasure in this deed of Thoreau's.—Bronson AlcottJournals (1938)
Thoreau revised the lecture into an essay entitled
Resistance to Civil Government (also known as
Civil Disobedience). In May 1849 it was published by Elizabeth Peabody in the
Aesthetic Papers. Thoreau had taken up a version of Percy Shelley's principle in the political poem
The Mask of Anarchy (1819), that Shelley begins with the powerful images of the unjust forms of authority of his time — and then imagines the stirrings of a radically new form of social action.
At Walden Pond, he completed a first draft of
A Week on the Concord and Merrimack Rivers, an elegy to his brother, John, that described their 1839 trip to the White Mountains. Thoreau did not find a publisher for this book and instead printed 1,000 copies at his own expense, though fewer than 300 were sold. Thoreau self-published on the advice of Emerson, using Emerson's own publisher, Munroe, who did little to publicize the book. Its failure put Thoreau into debt that took years to pay off, and Emerson's flawed advice caused a schism between the friends that never entirely healed.
In August 1846, Thoreau briefly left Walden to make a trip to Mount Katahdin in Maine, a journey later recorded in "Ktaadn," the first part of
The Maine Woods.
Thoreau left Walden Pond on September 6, 1847. At Emerson's request, he moved immediately into the Emerson house to help Lidian manage the household while her husband was on an extended trip to Europe. Over several years, he worked to pay off his debts and also continuously revised his manuscript for what, in 1854, he would publish as
Walden, or Life in the Woods, recounting the two years, two months, and two days he had spent at Walden Pond. The book compresses that time into a single calendar year, using the passage of four seasons to symbolize human development. Part memoir and part spiritual quest,
Walden at first won few admirers, but later critics have regarded it as a classic American work that explores natural simplicity, harmony, and beauty as models for just social and cultural conditions.
American poet Robert Frost wrote of Thoreau, "In one book ... he surpasses everything we have had in America."
John Updike wrote in 2004,