3641. THAT MEN ARE KEPT IN THE SOCIETY OF SPIRITS. All men whatever are kept, through the medium of subjects, in some society of spirits - apart from which one could not live - and that too in a society suited to the nature of each; so that if we suppose a thousand men at once, each one of them is kept in his own society. And as there are common principles [communia] of all things, so also of societies, of which a commune [communis] embraces a number [of single societies]. Between these there is a communication according to the Lord's disposal; thus each man [is placed] in a common society according to his nature, or according to the nature of that principle which there prevails; in others according to the varieties of his life. To these societies there exist opposites, for the equilibrium of all things is sustained by opposites, as experience has abundantly proved.