Final answer:
The motto "trust thyself" is based on the transcendentalist belief that one can ultimately rely on oneself to know what is right.
Step-by-step explanation:
The motto "trust thyself" is based on the transcendentalist belief that one can ultimately rely on oneself to know what is right. Transcendentalism is a philosophical and literary movement that emerged in the mid-19th century, emphasizing individuality, self-reliance, and the inherent goodness of both humanity and nature. The belief in trusting oneself is central to the ideals of transcendentalism, highlighting the importance of personal intuition and inner wisdom.
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