9106. They said further that another kind of spirits who go in troops, frequently come to them, desiring to know how things are with them, and that by various methods they draw out of them what they know. Concerning these they said that they are not insane, except in the fact that they have so great a desire to know, for no other use than to know. They were afterward instructed that these spirits are from the planet Mercury, and that knowledge and the derivative intelligence alone delight them, and not so much uses resulting from these, unless indeed knowledge is to them use (see n. 6811, 6815, 6921-6932, 7069-7079, 7170-7177).