1846. That the activities of spheres surround men may be inferred from a multitude of things, yea, even from natural things, which are encompassed by spheres, and which could neither exist nor subsist without them; and it is wonderful that the learned have not directed their thoughts to the subject of spheres, inasmuch as they are of such a nature as to manifest themselves in a variety of ways, and that, too, in every department of the threefold kingdom [mineral, vegetable, and animal]. Indeed, not even the smallest particle exists, which has not its own sphere around it, and conforming parts constitute a common sphere, itself also conforming to the parts. There are given spheres of all things, as well in respect to their activities as to their torpidities; as, for instance, spheres of heat and of cold. In things spiritual and celestial the matter is still more distinct, more extensive, and more manifest to those who are themselves spiritual and celestial.