leaving behind him all its belongings, and enters a world where there
is nothing of nature. In that world he lives so separated from nature
that there is no communication whatever by continuity, that is, as
between what is purer and grosser, but only like that between what is
prior and posterior; and between such no communication is possible except
by correspondences. From this it can be seen that spiritual heat is not
a purer natural heat, or spiritual light a purer natural light, but that
they are altogether of a different essence; for spiritual heat and light
derive their essence from a sun which is pure Love, and this is Life
itself; while natural heat and light derive their essence from a sun
which is pure fire, in which (as said above) there is absolutely nothing
of life.

91. Such being the difference between the heat and light of the two
worlds, it is very evident why those who are in the one world cannot
see those who are in the other world. For the eyes of man, who sees
from natural light, are of the substance of his world, and the eyes
of an angel are of the substance of his world; thus in both cases they
are formed for the proper reception of their own light. From all this
it can be seen from how much ignorance those think who, because they
cannot see angels and spirits with their eyes, are unwilling to believe
them to be men.

92. Hitherto it has not been known that angels and spirits are in a
totally different light and different heat from men. It has not been known
even that another light and another heat are possible. For man in his
thought has not penetrated beyond the interior or purer things of nature.
And for this reason many have placed the abodes of angels and spirits in
the ether, and some in the stars - thus within nature, and not above or
outside of it. But, in truth, angels and spirits are entirely above or