The query "living untethered pdf" could mean a few different things.
There is an irony in searching for a PDF of a book about letting go. The file you download remains static, unchanging, and stored in a hard drive. But the philosophy it contains is fluid and alive.
When reading the PDF, use the search function (Ctrl+F or Cmd+F) to jump between concepts. The book generally follows this progression:
Singer uses a powerful metaphor of a thorn buried deep in your arm. It is sensitive; if anything touches it, it hurts.
Singer uses the term "Samskaras" to describe past impressions that got "stuck" in your heart because you didn't want to feel them at the time. When an old feeling of insecurity or anger bubbles up, don't push it back down. Relax into it, breathe, and let it pass through you. The Verdict: Is It Worth the Read?