Developing Circles
The person who is developing mediumship will do well to surround himself
with persons of a certain type of psychical power, and to form circles
of such persons. Such persons are invaluable in constituting a
"developing circle." Such persons need not be mediumistic themselves,
nor are they required to actually do anything. Instead, their service is
that of being present as psychical reservoirs of force upon which the
spirits can draw for manifesting power. The medium, being sensitive to
helpful influences, and the reverse, will recognize such persons by the
congenial and harmonious influence they exercise upon him; and he will
do well to encourage such persons to sit in his developing circles.