dvanced and well developed clairvoyants usually assume
merely a condition of deep reverie or meditation, shutting out the sounds
and thoughts of the physical plane, so as to be able to function better on
the astral plane.

The reason that so many recorded cases have occurred when the clairvoyant
person was asleep, and the vision appeared as a dream, is simply because
in such a condition the physical senses of the person are stilled and at
rest, and there is less likelihood of interference from them, and a better
opportunity for the astral senses to function effectively. It is like the
familiar cases in which one becomes so wrapped up in viewing a beautiful
work of art, or in listening to a beautiful musical rendition, that he or
she forgets all about the sights and sounds of the world outside. One
sometimes gets into this same condition when reading an interesting book,
or when witnessing an interesting play. When the psychic powers are
concentrated upon any one channel of vision, the others fail to register
a clear impression. The same rule holds good on the astral plane, as on
the physical.

There are certain psychic conditions which are especially conducive to the
manifestation of clairvoyant phenomena, as all students of the subject
know very well. These conditions are somewhat hard to induce, at least
until the clairvoyant has had considerable experience and practice. But,
in the state of sleep, the person induces the desired conditions, in many
cases, though he is not consciously doing so. As might naturally be
expected, therefore, the majority of the recorded cases of clairvoyance
have occurred when the clairvoyant person has been asleep.

I should also state, once more, that in many cases in which the
clairvoyant has witnessed the "appearance" of another person, as in the
cases such as I have just mentioned, there is always the possibility of
the person having actually appeared in his astral body, unconsciously to
himself of course. No one but a skilled occultist is able to distinguish
between cases of this kind. The line between this class of clairvoyance
and astral appearance is very thin, and, in fact, the two classes of
phenomena shade and blend into each other. In reality, when one gets down
to bottom principles, there is very little difference between the actual
appearance in the astral body, and the strong projection of one's presence
by means of will, conscious or unconscious, along the lines of awakeni