Everything else in the book is for managing your state while something is happening to you. This room is for when nothing is. No fixing, no achieving, no next thing to get to.
The chapter lays out a three-stage sit built from tools you already have: an on-ramp (fifteen seconds of soundcheck, a sigh or two Trap Doors), a light anchor for the middle (attention resting on the feel of air at the nostrils, nothing to count or change), and an open sit for the last portion, where thoughts and sounds and sensation are all allowed. It explains the difference between technique-breath, which is a lever aimed at an outcome, and meditation-breath, which is a porch light.
It also contains the one observation in the book I can’t source: thoughts seem to arrive on the in-breath and thin on the out-breath. The Notes say what the labs have found nearby, and that nobody has tested it directly.
The tools for this room
Two rules, no exceptions
Never practice any technique on this site while you are driving, operating machinery, or doing anything that needs your full attention. The slow ones can make you drowsy, faster than you’d expect. And never practice a breath-hold, bellows breath, or any vigorous breathing in or near water. Read Before you begin for the doctor’s list and the rest.
This page is the doorway. The chapter walks you through the room with the stories, the exact sequence, and the limits.