After you have grown proficient in locating the corners of rooms, you
may have the Transmitter select other parts of the room, such as doors,
mantels, windows, alcoves, projections, etc. Try a number of these
selected locations in turn, gaining a variety of experiences which will
prove valuable later on. In all of these experiments the Transmitter
must guard you from running into obstacles, furniture, etc., by telling
you to avoid them, guiding you past them, and in other proper ways
prevent you from bruising yourself or breaking or upsetting things. You
must impress this upon his mind, and then you should give yourself into
his care with the utmost confidence, giving yourself no further concern
about these things, and keeping your mind as passive as possible. Don't
allow your mind to be distracted by outside things--attend to the matter
of the experiment in which you are engaged.