217. When the faculty is developed with a medium, it is essential that he should not abuse it. The satisfaction it gives to some beginners excites in them an enthusiasm it is important to moderate; they should remember that it is given to them to do good, and not to satisfy a vain curiosity ; this is why it is best to use it only at opportune moments, and not at every instant ; spirits not being constantly at their orders, they run the risk of being dupes of mystifiers. It is well to adopt certain days and hours for this purpose, for then greater concentration can be brought to it, and the spirits who desire to come are informed, and consequently prepared.
