In the third chapter of the Book of Jonah, Jonah finally reaches Nineveh, and starts preaching repentance and reformation to the people there. And... they listen! Even the King of Assyria listens!

The inner meaning of the story is pretty close to the surface here, and there's important symbolism. Swedenborg summarizes the chapter's meaning in this one sentence:

"The nations, hearing from the Word of God about their sins, and that they would perish, were converted after repenting, and were heard by the Lord, and saved." (The Inner Meaning of the Prophets and Psalms 213)

Rev. George McCurdy, in his exegesis of this chapter, offers this summary:

The great city of Nineveh has many spiritual representations. The world saw Nineveh as a mighty nation, but in the eyes of the Lord, it represented the shallowness and weakness (death) of false doctrines, contrived beliefs confirmed by the proprium (self love), the fallacies of the senses, and the unenlightened understanding that spawns spiritual ignorance.

The Lord’s mercy and love for all prompted Him not only to send His message to Nineveh, but to ensure that it would be preserved for eternity. Jonah’s call to "arise and go" preach to Nineveh is a call for spiritual renewal. It is a call for repentance. The fasting, sackcloth, and ashes symbolize a call to be aware that "where there is no truth, there is no church."

Where the Word is closed, and not loved, there is a loss of conjunction with the Divine resources. The fasting of man and beast symbolizes a need for the spiritual and natural appetites to come to the Lord for that "bread which comes down from heaven." The Ninevites giving up their natural food and drink represents their turning away from "as-of-self" concepts and reminds all who read and hear the Word of the Lord to rely on heavenly manna.

"Why do you spend money for what is not bread, and your wages for what does not satisfy? Listen carefully to Me and eat what is good, and let your soul delight itself in abundance…" (Isaiah 55:2)

The king sitting in ashes and mourning represents a sorrowful attitude toward "the remains of the fire of self-love." Repentance involves self-examination, making oneself guilty for the sins and evils committed, asking the Lord for His help, and desiring to attain a new life.

As we mull over this concept, think about the Lord’s preaching on earth. As He went about His mission, He often used these words: "You have heard it said of old… but I say unto you…" Putting aside human traditions and taking on the Lord’s teachings is an ongoing effort. Jonah was told to preach the words of the Lord. He was not to make things up from his memory. He was to be a true and faithful prophet of the Lord’s ways.

Here's a link to an interesting (audio) sermon on this chapter, by Rev. Todd Beiswenger.

Rev. Martin Pennington suggests two explanatory passages from Swedenborg's theological writings:

"Forty days means a period of temptation combats or severe change." (Arcana Coelestia 730)

"A fast represents those who are in a state of unhappiness when good is no longer joined to the truths." (Arcana Coelestia 9182[10])

Other references of interest listed by Rev. McCurdy include:

"As ‘forty’ signified what is full or complete… forty signifies what is complete in respect to instruction and influx… for this reason it was said by Jonah to the Ninevites that ‘the city would be overthrown after forty days" (Jonah 3:4) (Arcana Coelestia 9437[2])

"By being clothed in sackcloth is signified mourning on account of the vastated truth in the church; for garments signify truths; and therefore, to be clothed in sackcloth, which is not a garment, signifies mourning that there is no truth; and where there is no truth, there is no church." Jonah 3:5-6 is cited. (Apocalypse Revealed 492)

"…the rite of putting sackcloth on the loins to testify…mourning may be seen from the historic and prophetic parts of the Word, as in… Jonah 3:5-8… for a sign representative of mourning over the evil on account of which Nineveh was to perish; thus over destroyed good." (Arcana Coelestia 4779[2])

"From the signification of garments it is also manifest why they rent their garments, when any one spoke against the Divine truth of the Word… and why, on account of transgressions against Divine truths, they put off their garments, and put on sackcloth." Jonah 3:5, 6, and 8 are cited. (Apocalypse Revealed 166)

"That ‘ashes’ denote falsity, may be confirmed from passages where another word for ‘ashes (cinis)’ is used, for these ashes have a like origin…" Jonah 3:6 is cited. (Arcana Coelestia 7520)

"…by ‘ashes’ in the opposite sense, namely, what is condemned that remains after the burning from the fire of self love. This is signified by ‘the ashes’ which they carried on the head, and in which they rolled themselves when bewailing their sins." Jonah 3:6 is cited. (Arcana Coelestia 9723)

"In the spiritual sense by kings those who are in truths are signified, by the great ones those who are in goods, by the rich those that are in the knowledge of good, by the mighty they that are in erudition, by servants they that are in such things from others, and thus from memory, and by freemen they that are in such things from themselves…" Jonah 3:7 is cited. (Apocalypse Revealed 337)

"The interior good and also the interior evil…are signified by ‘man,’ are those which are of the intention or end, for the intention or end is the inmost of man; but the exterior good and also the exterior evil which are signified by ‘beast,’ are those which are of the thought, and of the consequent action when nothing stands in the way…By ‘beast,’…in respect to the external or natural man, a man is nothing else than a beast, for he takes delight in the like cupidities and pleasures, as also in the like appetites and sense…Therefore… from a holy rite it was commanded by the king of Nineveh, that both man and beast were to fast, and were to be covered with sackcloth (Jonah 3:7, 8)." (Arcana Coelestia 7523)

"… in the spiritual world a man’s affections appear at a distance like beasts… and beasts, viewed in themselves, are nothing but forms of natural affections… By man and beasts together is signified man as to spiritual and natural affection, in the following passages… Jonah 3:7, 8…" (Apocalypse Revealed 567)

"Here ‘webs’ and ‘garments’ are predicated of things of the understanding, that is, of the thought; ‘iniquity’ and ‘violence,’ of things of the will, that is, of works. In Jonah 3:8… the ‘evil way’ is predicated of falsities, which are of the understanding; and ‘violence,’ which are of the will." (Arcana Coelestia 623[2])

"…the ‘wrath of anger’ is attributed to Jehovah, and consequently ‘repentance.’" (Arcana Coelestia 588[2])

"…the Word is such in the sense of the letter, it may be evident that it cannot be understood without doctrine. But let examples illustrate this. It is said that Jehovah repenteth (Jonah 3:9; 4:2), and it is also said that Jehovah repenteth not (Num. 23:19…): without doctrine these statements do not agree." (Teachings Regarding the Sacred Scripture 51)

"In these passages (Jonah 3:9,10) Jehovah is said to have ‘repented,’ when yet it cannot be that He repents, because He knows all things before He does them; from which it is evident that by ‘repenting’ is signified mercy." (Arcana Coelestia 10441[2-4])

Finally, here's a link to Rev. McCurdy's study guide for the Book of Jonah, which is available for free as a .pdf, for your use.

10109. 'And they shall eat those things containing what has been expiated' means the making of good their own by those who have been purified from evils and consequent falsities. This is clear from the meaning of 'eating' as making one's own, dealt with above in 10106; and from the meaning of 'what has been expiated' as that which has been purified from evils and consequent falsities, dealt with in 9506. The words 'purified from evils and consequent falsities' are used because falsities as well as truths exist with those ruled by evil, and also falsities as well as truths exist with those who are governed by good. The falsities present with those ruled by evil are falsities of evil, and the truths present with them are falsified truths, which are dead. But the falsities present with those governed by good are accepted as truths, for those falsities are tempered by the good and put to good and useful purposes, and the truths present with them are the truths of good, which are alive. Regarding both kinds of falsity and truth, see what has been shown in 2243, 2408, 2863, 4736, 4822, 6359, 7272, 7437, 7574, 7577, 8051, 8137, 8138, 8149, 8298, 8311, 8318 (end), 9258, 9298.

[2] Since 'eating the holy things containing what has been expiated' means the making of good their own by those who have been purified from evils and consequent falsities, anyone unclean was strictly forbidden to eat of those things; for uncleanness means defilement by evils and consequent falsities. For the situation is that as long as a person is steeped in evils and consequent falsities good cannot by any means be made his own. This is because evil comes up from hell and good comes down from heaven, and where hell is heaven cannot be, since they are diametrically opposed to each other. Therefore to make a place for heaven - that is, for good from heaven - hell, that is, evil from hell, must be removed. From this it may be seen that good cannot by any means be made a person's own as long as he is ruled by evil. By making good his own the implanting of good in the will should be understood, for good cannot be said to have been made a person's own until it becomes part of his will. A person's will is the actual person, and his understanding also, to the extent that it derives from the will. For what is part of the will forms part of the person's love and consequently his life, since what a person wills he loves and calls good, and also when it is done by him it is felt to be such. The situation is different with those things which are part of the understanding but not at the same time part of the will. It should also be recognized that when a person is said to make good his own, no more should be understood than his ability to receive good from the Lord, an ability he is endowed with through regeneration. Consequently good as it exists with a person is not that person's; rather it is the Lord's with him. And he is maintained in it to the extent that he allows himself to be withheld from evils. The impossibility for good to become a person's own, that is, for it to be transmitted to him, as long as he is ruled by evil was the reason for the prohibition which prevented one who was unclean from eating the flesh and the bread of a sacrifice; for that eating represented making good one's own, as stated above.

[3] Those who were unclean were forbidden on pain of death to eat from holy offerings, as is clear in Moses,

Everyone who is clean shall eat flesh. The soul who eats the flesh of sacrifices while uncleanness is on him shall be cut off from his people. The soul who touches anything unclean - the uncleanness of a human being or an unclean beast or any unclean creeping thing whatever - and eats of the flesh of the eucharistic sacrifice shall be cut off from [his] people. Leviticus 7:19-21.

All those outward kinds of uncleanness represented inward kinds, which are a person's evils; and they are evils present in his will, having been made his own by the life he actually leads.

[4] This matter is described further elsewhere in Moses,

Any man of the seed of Aaron who is a leper or suffers a discharge shall not eat of the holy things until he has been made clean. Whoever has touched anything made unclean by a corpse ¹ , [or any] man who has had an emission of semen ² , or [any] man who has touched any creeping thing by which he is defiled, or [has touched] a person by whom any one is defiled, as to all his uncleanness - the soul who has touched that thing shall be unclean until evening and not eat of the holy things. But when he has washed his flesh with water, and the sun has gone down, he shall be clean; and afterwards he shall eat of the holy things, because it is his bread. No outsider shall eat what is holy; a stranger staying with a priest, or a hired servant, shall not eat what is holy. If the priest buys a soul - a buying with his silver - [that soul] may eat of it, and one who is born in his house; these shall eat of his bread. When a priest's daughter has married a man, an outsider, she shall not eat of the heave offering of holy things. But if the priest's daughter has been made a widow or divorced and has no seed, and has indeed returned to her father's house, as in her youth, she shall eat of her father's bread. Leviticus 22:1-16.

All these rules, it is plainly evident, serve to mean more internal considerations, that is, they imply the transmission of holy things to those in a receptive state of mind, who then make those things their own. The rule that no outsider could eat the holy things meant, not those who do not acknowledge the Lord within the Church, thus not those with whom none of the Church's truth and good exists. The rule that no stranger or hired servant could eat them meant, neither those with whom natural good exists devoid of the good of faith, nor those who do good for the sake of reward. The rule that those bought with silver and those born in the house could eat them meant, those who have been converted, and those with whom the Church's truth and good exists as the result of faith and love. The rule that a priest's daughter married to a man who was an outsider could not eat them meant that the good which had not been wedded to the Church's truths [but to something other] could not make the holy things of the Church its own. The rule however that a widow or a divorcee who had no seed could eat them meant that good can be made one's own after the removal of things which do not belong to the Church, provided that no notions have been hatched or born out of that union that have become an integral part of one's faith. The fact that such considerations are meant is evident from the internal sense of these specific rules.

[5] But hereditary evils do not prevent anyone from making good his own. This consideration too is described in Moses,

No man of the seed of Aaron in whom there is a blemish shall approach to offer the bread of God - no man who is blind, lame, mutilated, or [has a limb] too long; none who has a broken foot or hand, is a hunchback, is bruised, has a defect in his eye, has scabs, has warts, or has a crushed testicle. He shall not approach to offer the bread of his God; but he shall eat the bread of God from among the most holy and the holy things. Leviticus 21:17-23.

These defects, as has been stated, serve to mean hereditary evils, some specific evil being meant by each particular defect. The reason why these men should not offer bread or approach the altar as priests was that if they did so the people would catch sight of those imperfections or ills, and in what was caught sight of some representation would take shape, none of which would happen if those defects remained hidden. For although a priest, Levite, or the people were unclean inwardly, they were nevertheless called clean and also thought to be sanctified, provided that outwardly they were washed and looked clean.

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