In Emily Dickinson's poem, she expresses the idea that books provide an unparalleled means of escape and adventure. They transport readers to distant lands and experiences, much like a ship or a fast horse would, yet they do so without any cost or toll. This highlights the accessibility of literature to everyone, regardless of their financial situation.

Furthermore, Dickinson emphasizes the simplicity and elegance of a book as a vehicle for the human spirit. Through poetry and prose, individuals can explore their imagination and emotions, making literature a powerful tool for personal growth and exploration. The metaphor of the "frugal Chariot" suggests that books are not only valuable but also a fundamental aspect of the human experience.