111. Few people today know what true conjugial love is and what is its origin, because few are in it. Almost all believe that it is inborn and thus emanates from a kind of instinct, as they say; and they believe this the more because a conjugial principle exists among animals, when there is such a difference between conjugial love with human beings and the conjugial principle with beasts, as there is between the state of a human being and that of a brute animal.