20. The spirits of Mercury differ altogether from the spirits of our earth, for the spirits of our earth do not care so much about realities, but about worldly, corporeal, and terrestrial things, which are material; wherefore the spirits of Mercury cannot be together with the spirits of our earth, therefore wheresoever they happen to meet them, they flee away; for the spiritual spheres, which are exhaled from each, are almost contrary. The spirits of Mercury have a common saying, that they do not wish to look at a sheath, but at things stripped of their sheath, that is, at interior things.