This statement is true.
For the Transcendentalists, self-knowledge was essential to raise the individual to a very high spiritual level, which would positively change his whole life.
They believed that to reach this level of self-knowledge it was necessary to have an environment with high fullness, positivity, and comfort, the only place where all these elements meet is in nature.
Therefore, they valued the natural world and saw it as a gateway for each individual to recognize their self.
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