Meditation
In advanced stages of meditation, practitioners experience the
absence of the center or locus of observation, called the diffusion
of the observer. This indicates that one is experiencing awareness
as boundless Presence (or space), centerless and omnipresent.
(The Point of Existence, pg 110)

Meditation can be seen as nothing but the spontaneous and passive
awareness of the movement of rejection and desire. The awareness
of the rejection is the meditation. You can be aware of this truth
all the time; in fact meditation is actually needed all the time.
Meditation is awareness of the truth, so we sense, look, and listen
all the time to be aware of the simple truth of what is now. If
you want anything else, it is a rejection. If you do anything beyond
the awareness and the understanding, there is rejection, and then
you're compounding the problem. (Diamond Heart Book 2, pg 92)

The best attitude for doing the meditation is to forget about
results. Forget about what will happen when you do the meditation
-- just do it. When you meditate, you might not feel your Presence,
but that is fine. Just the doing of the meditation is what is
needed. Sometimes you will feel present, sometimes you won't.
Sometimes you will feel wonderful, sometimes you'll feel miserable.
These factors do not determine the value of meditation. What determines
the value of meditation is that you do the meditation. If you
really do it, in time you'll become present mainly because you
will not go along with the judgments and preferences of the ego.
You tell yourself that for 20 minutes a day, whatever your ego
says, you're going to do it. This attitude by itself brings the
true will, which brings true Presence and detachment from the
ego. Meditation is oriented towards Presence. (Diamond Heart Book
3, pg 58)

The action of meditation can be very simple. It is perceiving the
process of becoming, with its wanting, desiring, pushing, and pulling.
You can just be aware of all that because it is not Being. The more
you are aware of this movement of becoming and allow yourself the
possibility that it is not working regardless of what it is moving
towards, the more you can observe and experience the gap directly.
And if you don't follow any movement, attitude, or reaction to it,
you may find yourself to be complete. (Diamond Heart Book 3, pg
93)

Meditation, space and body-image
This illustrates the primary reason for the extreme difficulty
encountered when an individual attempts to achieve a clear experience
of open space through meditation techniques, as in Eastern spiritual
schools; for the experience of space, because it involves the dissolving
of defenses, will bring into consciousness any distortions in body-image.
The defense mechanisms of the ego will then automatically mobilize
to prevent consciousness of the affective experiences associated
with these distortions. This mobilization of defenses in effect
amounts to the repression of space. Space not only reveals distortions,
but because it exposes self-boundaries, it naturally brings into
consciousness all the identifications making these boundaries, as
well as any affects and memories connected to them. Naturally then,
space will be vehemently defended against. Space is actually dynamically
repressed; and this fact, besides explaining the difficulty in experiencing
space, indicates the usefulness of psychodynamic techniques to those
seeking this experience. (The Void, pg 49)