It provided him comfort while trying to cope with John’s death. A simple flower or plant was soothing to him as he learned to become one with nature because nature is calm and at peace and so should the soul (Miller 53). He also saw nature as art with places like Niagara Falls, the Hudson River Valley, the Catskill and White Mountains (Millar 46). Nature is to be respected and to disturb it was wrong in Thoreau’s eyes. Thoreau’s search for a simpler life kept him on Walden Pond. From time to time he worked at the pencil factory to earn some money and he also learned to be a land surveyor, but he spent as much time possible reading and writing, which helped lessen the pain of losing John. In 1846, while still at Walden Pond, Thoreau found himself in some legal trouble and had to spend the night in jail for failure to pay a poll tax. His experience of being in jail leads him to write one of his best known essays called, Civil Disobedience. The essay condemns the American government, slavery, and the Mexican-American War. The essay allows Thoreau to express his voice in protest against an unjust law without the violence. Through the years, many great leaders such as Martin Luther King and Mahatma Gaudi adopted Civil Disobedience as their way to protest (Buell 259). Even though it was Thoreau most powerful essay, at the time it received very little attention. After Thoreau had passed, Civil Disobedience was renamed and called Civil Government (Buell