As this is the correspondence of the genital organs in the two sexes, it
is evident that by creation they are holy, and therefore they are
devoted solely to chaste and pure marriage love, and are not to be
profaned by the unchaste and impure love of adultery, by which man
converts the heaven in himself into hell; for as the love of marriage
corresponds to the love of the highest heaven, which is love to the Lord
from the Lord, so the love of adultery corresponds to the love of the
lowest hell.

The love of marriage is so holy and heavenly because it has its
beginning in the inmosts of man from the Lord Himself, and it descends
according to order to the outmosts of the body, and thus fills the whole
man with heavenly love and brings him into a form of the Divine love,
which is the form of heaven, and is an image of the Lord. But the love
of adultery has its beginning in the outmosts of man from an impure
lascivious fire there, and thus, contrary to order, penetrates toward
the interiors, always into the things that are man's own, which are
nothing but evil, and brings these into a form of hell, which is an
image of the devil. Therefore a man who loves adultery and turns away
from marriage is in form a devil.

As the organs of generation in the two sexes correspond to the societies
of the third heaven, and the love of a married pair corresponds to the
love of good and truth, so those organs and that love correspond to the
Word. The reason is that the Word is Divine truth united to Divine good
going forth from the Lord; and this is why the Lord is called "the
Word," also why in every particular of the Word there is a marriage of
good and truth, or a heavenly marriage. That there is such a
correspondence is a mystery not yet known in the world, but it has been
made evident and proved to me by much experience.