8. Spirits draw their perispirit from the place where they find themselves; that is to say, that this envelop is formed from the ambient fluids. The result is, that the constitutive elements of the perispirit must vary according to worlds. Jupiter, being a very advanced world, in comparison to the Earth, where corporeal life has not the materiality of ours, its perispiritual envelopes must be of a nature infinitely more ethereal than upon our Earth. Now, although we would not be able to exist in that world in our carnal bodies, our spirits would not be able to penetrate there with their terrestrial perispirit. In quitting the Earth the spirit leaves there its fluidic envelop, and is supplied with another appropriate to the world where he must go.