What does this passage call the source of life force? Where do yours come from?

Theme: energy · card 4/4 · 2026-05-13

This frame, so slightly clad, was a sort of crystallization around me, and reacted on the builder. It was suggestive somewhat as a picture in outlines. I did not need to go outdoors to take the air, for the atmosphere within had lost none of its freshness. It was not so much within doors as behind a door where I sat, even in the rainiest weather.

— Henry David Thoreau, Walden, and On The Duty Of Civil Disobedience

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