3. Even though certain phenomena may be induced because they result from free intelligences, they are never at our complete disposal, no matter who we are, and whoever attempted to obtain them at will would be demonstrating either their ignorance or their bad faith. We must wait for the phenomena and understand them as they happen, and quite frequently it is at the moment when it is least expected that the most interesting and most conclusive incidents occur. Persons who seriously want to learn must therefore approach ! this subject - like all others - with patience and perseverance, and do everything that needs to be done; otherwise, they would be better off not to concern themselves with the matter.