The medium should ever strive to guard against this harmful mental state, and should open himself completely to the spirit influence, casting aside all fear and doubt, and placing all responsibility upon the controlling spirit or band of helpers. The medium should remember that he is merely the "medium" or psychic telephone system, and is not an active party to the process of spirit communication. He should, therefore, never either unduly strive to please, nor be fearful or distrustful concerning the validity of the manifestation being made through him. Let the spirits attend to their end of the line, and the sitters to the other end--the medium is on neither end of the line, but is the line itself. Interrupted Communications. It should not be forgotten, in this connection, that the spirits have their own difficulties to contend with. In the current slang phrase, they "have troubles of their own" to overcome in the production of mediumistic phenomena. Not only does the spirit wishing to communicate have to draw sufficient psychic power from the medium and the sitters, not only has he to scientifically adjust the apparatus at the sending end of the psychic telephonic line, but he has also to be sure that he is actually communicating the message so that it may be received by the sitters. In such cases the spirit is placed in a position similar to that of a person at one end of a telephone line, who after had an answer to his opening "Hello!" talks away, thinking that the person at the other end is hearing every word he utters, perfectly unconscious that the communication has been interrupted from some cause or other common to telephone lines. How often do we, in our telephone conversations, interrupt our flow of talk to anxiously inquire, "Are you still there?" or "Do you hear me?" Some Difficulties of the Spirits.