The Higher Spirits
The Higher Spirits "An important peculiarity in the relative powers
of the higher and lower spirits, which we have already alluded to, is
that the higher spirits are not visible to those below them; whilst the
former have the power to see all the spirits on the earth-plane. The
latter, therefore, are ignorant of the others' presence, unless it
is desired to make them aware of the fact. Hence, at séances it often
happens that spirits are present who are unknown to one another, and can
only be aware of each other's presence by listening to the
communications given through your mediums. An earthly spirit is not
aware how many higher spirits are present, and you are not aware how
many earthly spirits are present, so that you see the latter have a
similar advantage over you to what we have over them. People in the
habit of communicating with earthly spirits through those mediums, with
whom only spirits of this class are connected, wonder why they only
receive messages from strangers, never from their own relations. If the
latter are in the Summerland, or the third sphere, of course it is
easily intelligible; for we must explain to you that spirits from a
higher sphere can only communicate with you through a medium who has
reached the same degree of development as themselves. Thus, you see,
that if you wish to communicate with the higher spirits, you must first
place yourself on a spiritual level with them, otherwise you will never
get messages from any spirits above the earth-plane. Another great law
of spirit communion is that the higher spirits can read the thoughts of
the lower ones — each sphere, in fact, comprehending the one below
it."