41. It is by the aid of its perispirit that the spirit acts upon his living body. It is with this same fluid that it manifests itself by acting upon inert matter; that it produces sounds, movement of tables, and raises, overturns, or transports other objects. There is nothing surprising in these phenomena if one considers that with us the most powerful motors are found in the most rarefied and even imponderable fluids, like air, vapor, and electricity.
It is equally by the aid of his perispirit that the spirit enables mediums to speak, write, or sketch. Having no tangible body to manifest, he serves himself with the body of the medium, from which he borrows the organs and uses as if it were his own, obtaining possession of it by the fluidic-effluvium which he throws around it.