There are spiral motions into which souls must be introduced in order to be able to stay amongst their companions, thus not only to speak, but also to think together with them, and finally to think rightly, or what is true and good. There are many kinds of introduction-just as many as there are of agitations of the serum and of the blood in the human body. Of these there are many kinds and species, and there are also levels of them, the lowest level being only that they can be in spiral motions together with their companions. Even evil spirits can be introduced into these and adapted so as to be in the same gyres. For example, evil spirits can speak and feel in a person on earth just as well as good spirits. This takes place in a twofold manner, by spiral motions alone, and by the a forcing of their speech, as just spoken of [1014], to make it agree with their thought.

1015 1/2. There are levels of these agitations and introductions, represented in the body, as far as the blood is concerned, by the agitation of the blood in the gallbladder, by its agitation in the liver, from which comes the hepatic bile, by its agitation outside of the biliferous pores, when the lymph together with the purer blood is carried off into the lymphatic vessels.