277. To recapitulate: from what we have just said, it results that the power of invoking any spirit whatever does not imply that the spirit is at our orders ; he can come at one moment, and not at another, with such medium or such invocator as pleases him, and not with such other; say what he pleases, without being constrained to say what he does not wish to say; go when it is agreeable to him ; finally, from causes dependent or not upon his will, after having shown himself assiduously during some time, he may suddenly cease to come. It is from all these motives that when we desire to call a new spirit, it is necessary to ask our guide protector, if the invocation is possible ; in cases where it may not be, he quite generally gives the motives, and then it is useless to insist.
