Jealousy is here treated of because this also pertains to conjugial love. But there is a just jealousy and an unjust. Just jealousy exists with married partners who mutually love each other. With these, jealousy is a just and prudent zeal lest their conjugial love be violated; hence a just grief if it is violated. Unjust jealousy exists with those who are suspicious by nature and have a sickly mind arising from a viscous and bilious blood. Moreover, by some, all jealousy is accounted a fault; this is especially so with whoremongers who cast vituperations even upon just jealousy.
The word zelotypia (jealousy) is derived from zeli-typus,* and there is a type or image of a just zeal and of an unjust; but these distinctions shall be unfolded in what follows, and this in the following series:
I. That zeal, regarded in itself, is as the fire of love blazing.
II. That the burning or flame of the love, being its zeal, is a spiritual burning or flame arising from a molestation of the love, and an attack upon it.
III. That a man's zeal is such as his love is, thus of one kind with him whose love is good, and of another with him whose love is evil.
IV. That in outer manifestation, the zeal of a good love and the zeal of an evil love are alike, but inwardly they are wholly unlike.
V. That inwardly in the zeal of a good love lie love and friendship, but inwardly in the zeal of an evil love lie hatred and revenge.
VI. That the zeal of conjugial love is called jealousy.
VII. That jealousy is as a fire blazing out against those who molest the love with the partner, and as a dreadful fear for the loss of that love.
VIII. That jealousy is spiritual with monogamists, and natural with polygamists.
IX. That with married partners who tenderly love each other, jealousy is a just grief from sound reason, lest their conjugial love be divided and thus perish.
X. That with married partners who do not love each other, jealousy is due to many causes, and with some to various kinds of mental sickness.
XI. That with some there is no jealousy, and this also from various causes.
XII. That there is jealousy also for mistresses, but it is not of the same nature as for wives.
XIII. That there is jealousy also with beasts and birds.
XIV. That jealousy with men and husbands is different from jealousy with women and wives.
Now follows the explanation of the above.
* In classical Latin zelotypia is used only in a few passages in Pliny and, as a Greek word, in Cicero. Both these authors use it as meaning simply jealousy. In the present text, it is given a special and limited definition "the zeal of conjugial love"; but the whole of the present chapter indicates that it is used to signify any jealousy, whether good or evil, that is connected with marriage. The ordinary Latin word for jealousy and the word used throughout Swedenborg's Writings is invidia, and the ordinary word for zeal is zelus. Zelotypia is used by Swedenborg only in the present chapter, and in 3 Adversaria no. 723, and in his translation of Num. 5:15 in Doct. of the Lord no. 48 and Ind. Bib. s.v."