452. When we wish to impress the mind of the medium, by the effort of our magic will, (provided always that he or she is in sympathy with or sustains a negative relation to the operator,) we can dispose and arrange the magnetic currents of the brain so as to form or fashion them into ideas of our own. We can also learn to read the thoughts of another—conditions being favourable—as readily as you can gain a knowledge of the characters or symbols of a language foreign to your own. 453. Thoughts being motions of the mind, assume specific and definite forms, and when _distinct_ in the mind can be clearly perceived and understood by any spirit who is in sympathy with the mind in which they are generated. 454. To influence, mechanically, the hand of a medium to write, we direct currents of vitalized spiritual electricity on the particular muscles which we desire to control. In order to produce the physical manifestations, it is not by any means requisite that the medium should be possessed of a good moral character or well-balanced mind, as an individual of small mental calibre would answer our purpose equally well; but an advanced spirit could not directly impress or control the organs of a mind with which he is not in affinity, and _vice versâ_. 455. We can instantly determine the sphere of a spirit, in or out of the body, by the particular brilliancy and character of the light in which he is enveloped, as well as by the peculiar sensation which his presence creates. 456. The raps are produced by _voluntary_ discharges of the vitalized spiritual electricity, above mentioned, from the spirit, coming in contact with the animal electricity emanating from the medium. These discharges we can direct at will to any particular locality, thereby producing sounds or concussions. 457. The question being often asked, “How do you move solid substances?” I would partly answer it by asking, How does a magnet attract and raise from their resting-places certain bodies within whose sphere it is brought? How does a man move his body and direct it whithersoever it goeth? How does God, the almighty cause of all causes, move and keep in perpetual motion the immense systems which revolve in space, and maintain each in its due relative position? I answer, By the magnetism of a _positive_ will.