I believe it is a autobiography because it is told by the person because they know all of the details and events that happened...? I am not 100% sure I am just trying to help.
Answer:
because it could be like a trailer for a book
Explanation:
Transcendentalism is a philosophical movement developed in the USA in the 1820s, which focuses on the kindness of people and nature, as well as on people's independence and ability to depend on oneself. It was born in opposition to the intellectualism and spirituality of the time. Consequently, Thoreau's quote reflects his conscious and intentional decision to move to the forest in order to discover the meaning of life and his own independent self.