Reading Map · How to Read This Book

This book is one road, walked in five stretches. Here is the map, so the walking is unhurried.

The Five Stretches

Part One · The Measure. Get the ruler right. The fruits are measured not by experience but by severance—counting what is gone. Two chapters: the first exchanges the ruler, reading the World-Honored One's own defining sentences and the Bamboo Grove case of "no absorption, yet the taints exhausted"; the second reads the ruler's markings—every fruit has two faces, approach and fruit: coming down, and down for good. The whole book's ruler and grammar live in this part; the four stations after it stand on it.

Part Two · The Sotāpanna. The step from ordinary to noble. The three fetters that fall first govern not going far but setting out—who walks, whether to walk, which road; and the "stream" entered is the noble eightfold path. Then two weighty sentences: no falling to the lower destinies, at most seven returns—not certificates of guarantee, but corollaries that grow out of severance itself.

Part Three · The Sakadāgāmin. The finest-fought battle in the book. The second fruit's definition holds the word "attenuated," which sounds like a degree, like seventy percent—this part walks inside the word and finds it a count, not an impression: a nine-part wall, six parts permanently down. Here the ruler's markings grow one level finer.

Part Four · The Anāgāmin. Across the realm. The five lower fetters gathered and exhausted, the person does not return to the desire realm—from "how many times remain" to "no longer here," the subtraction tears through the wall of a realm for the first time. And past the crossing, the ways of arriving at nibbāna are five: sparks from one iron, differing only in when they go out, never in size or rank.

Part Five · The Fruit of Arahantship (Approach). Written to the threshold. The last five walls—craving for form, craving for the formless, conceit, restlessness, ignorance—hard because hidden, not because heavy; what moves them is the perception of impermanence. Then the last cut: the exhaustion of the taints. That instant is at once the subtraction's completion and freedom's opening; this book writes the first face, and sets down the pen before the door opens.

The Four Bridges

Between the five parts stand four "transitions." They are short—bridges between stretches: gather what was gained, look at what lies ahead, then take the next stretch. Do not skip them; each station's questions are first asked on the bridges.

Three Ways to Read

One. Walk from beginning to end. This is best. The book is one ascending argument: Part One's ruler measures direction in Part Two, meets the challenge of "attenuated" in Part Three, reads the crossing in Part Four, and walks to the threshold in Part Five. Miss no stretch, and the road runs smooth.

Two. In a hurry: finish Part One first. The ruler is handed over there. With its two chapters read, the most necessary thing is in your hands; whichever later station calls to you can then be read on its own.

Three. Come with a question: go to its station. Carrying "have I entered the door"—go to Part Two. Sensing "my greed and anger seem lighter" and unsure what it counts for—go to Part Three. At ease in deep absorption—Part Five's first chapter holds a mirror. But whichever you visit first, make up Part One: without the ruler in hand, the stations' words will warp.

A Few Conventions

• Of the Buddha, this book's Chinese original uses the reverent pronoun 祂; of noble disciples and practitioners, the ordinary 他. The English mirror capitalizes pronouns for the Buddha.
• Our original teacher is written in full: homage to Śākyamuni Buddha.
• The suttas' own words stand in indented quotation blocks—so the eye can always tell the canon's words from the teller's.
• Canonical numbers, romanized terms, and source details are kept out of the body text and gathered at the back: chapter-by-chapter sources in Appendix A (Academic Notes Index), and term romanizations in Appendix C (Glossary of Terms).
• This book and The Arahant's Mastery on the attainment axis are twin volumes: this one is written to the threshold; the freedom inside is in that one. Each stands alone; together they are whole.

Setting Out

The map ends here. Roads are for walking.

We begin with Part One: getting the ruler right.