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.

9198. 'Any widow' means those who have good that is without truth, and still have a desire for truth. This is clear from the meaning of 'a widow' as good that is without truth and nevertheless has a desire for truth. The reason why 'a widow' has this meaning is that 'a man' (vir) means truth and his 'wife' (mulier) good, so that when this man's wife has become a widow she means good that is without truth. But in an even more internal sense than this 'a widow' means truth that is without good, the reason being that in that sense 'a husband' (maritus) means good and his 'wife' (uxor) truth, see 3236, 4510, 4823. In this sense the Lord by virtue of His Divine Good is called 'Husband' and 'Bridegroom', while His kingdom and Church by virtue of its acceptance of Divine Truth that emanates from the Lord is called 'wife' and 'bride', 9182. But since the subject now is not the Lord's celestial Church but His spiritual Church, 'a widow' means one who has good but not truth, and still has a desire for truth. It is similar with 'an orphan'. In the inmost or celestial sense 'an orphan' means those who have good and a desire for truth. See what has been introduced and explained in 4844 regarding the meaning of 'a widow' and 'an orphan' in the celestial sense. To this let what the Lord says in Luke about the widow in Zarephath be added,

Truly I say to you that no prophet is accepted in his own country. In truth, I tell you, there were many widows in Israel in the days of Elijah, when the heaven was shut up three years and six months, while there was a great famine over the whole land; yet Elijah was sent to none of them, except to Zarephath of Sidon, to a woman - a widow. Luke 4:24-26.

[2] Since the Divine was the source of all the things spoken by the Lord they have an inner meaning; and the subject in that inner meaning is the Lord Himself, also His kingdom and the Church. Therefore what the Lord meant on that level of meaning by the things He said about the widow in Zarephath of Sidon may be seen if brought out into the open.

No prophet is accepted in his own country

This means that the Lord and Divine Truth that comes from Him are less well received and loved in people's hearts within the Church than outside it. The Lord spoke these words to the Jews, among whom the Church existed at that time; and as is well known, the Lord was less well received there than by gentiles who were outside the Church. The situation is similar in the Church at the present day, which takes its name Christian from Him. In this Church the Lord is indeed received in what it teaches; yet few accept Him by acknowledging Him in their heart, fewer still doing so with love and affection. The acceptance of Him by gentiles outside the Church who have been converted is different. They worship and adore Him as their one and only God; they declare with their lips and contemplate in their hearts that they acknowledge Him as their God, since He has appeared in human form, 5256. A contrary attitude exists within the Church. Here, because He was born a human being, there is scarcely any acknowledgement of Him as God in people's hearts. They make His Humanity like their own, even though they know that His Father was Jehovah and not a human being. All this shows what 'No prophet is accepted in his own country' has been used to mean in the internal sense. In this sense 'a prophet' means the Lord in respect of Divine Truth, and so in respect of the teachings of the Church. For the meaning of 'a prophet' as one who teaches, and in the abstract sense as doctrinal teachings, and - when it is used in reference to the Lord - as Divine Truth or the Word, see above in 9188 (end).

[3] There were many widows in Israel in the days of Elijah

In the internal sense this means the situation at that time, when God's truth coming from the Word was acknowledged in the Church. 'Widows' are those who have good that is without truth, as stated above; 'Elijah' is the Lord in respect of the Word, 'the days of Elijah' being the situation or state at that time, when God's truth coming from the Word was received; and 'Israel' is the Church.

'Elijah' represented the Lord in respect of the Word, see Preface to Genesis 18, and 2762, 5247 (end), 8029. 'Days' are states, 893, 2788, 3462, 3785, 4850, 6110, 8426. 'Israel' is the Church, 4286, 6426, 6637, 8805.

[4] When the heaven was closed for three years and six months

This means the internal Church completely laid waste, 'the heaven' meaning the internal aspect of the Church, and 'three years and six months' meaning to completeness. For the meaning of 'the heaven' as the internal aspect of the Church, see 1733, 1850, 3355, 4535. It is said to be 'closed' when it has been laid waste and exists no longer. As regards the meaning of 'three years and six months' as to completeness, this is clear from the meaning of '1260 days' in Revelation 11:3; 12:6 - this number of days making up three years and six months - as to completeness or right to the end. It is clear likewise from the meaning of 'three days and a half', Revelation 11:9-11, and also of 'a time and times and half a time' in Revelation 12:14, and in Daniel 12:7 too, as to completeness or right to the end.

[5] While there was a great famine over the whole land

This means the external Church also laid waste, for 'a famine' is an absence and want of truth and good, 3364, 5277, 5279, 5281, 5300, 5360, 5376, 5415, 5576, 6110, 7102, and 'the land' or 'the earth' is the external Church, 1262, 1413, 1733, 1850, 2117, 2118 (end), 3355, 4535, 5577, 8011, 8732.

Yet Elijah was sent to none of them

This means the Lord in respect of the Word, thus the Lord's Word, not sent to others, because it would not have been received elsewhere, 'Elijah' being, as stated above, the Lord in respect of the Word.

[6] Except to Zarephath of Sidon, to a woman - a widow

This means sent only to those who have good and a desire for truth. The description 'Zarephath of Sidon' is used because 'Sidon' means cognitions or knowledge of goodness and truth, 1201. The fact that 'a woman - a widow' means one who has good and a desire for truth is evident from this, and especially from what is recorded about her in the first Book of Kings,

Elijah came to Zarephath of Sidon, to a woman - a widow - to sustain him. He told her to bring him a little water to drink, and then to bring him a small piece of bread in her hand. She said that she had a tiny amount of flour in a jar, and a tiny amount of oil in a flask, to make just a cake for herself and her son. Elijah said, Make me a small cake from it first, and bring it to me; and make one for yourself and your son after that. She did so; and the jar of flour was not used up, and the flask of oil did not fail. 1 Kings 17:9-15.

[7] Obedience, and the desire that good has for truth, is described by her giving the prophet water, as she had been commanded to do, and then by her making a cake for him first from the little she had, and for herself and her son after that. Consequent enrichment in the good of truth is meant when it says that the pot of flour was not used up and the flask of oil did not fail.

'Water' in the internal sense is truth, 2702, 3058, 3424, 4976, 5668, 8568. 'Flour' is truth derived from good, 2177. 'Oil is the good of love, 886, 4582, 4638. 'A cake' made from these ingredients is truth joined to its own good, 7978.

From all this it is plain that 'a widow' means one who has good and a desire for truth. Good and its desire for truth is described by her charity towards the prophet, greater than towards herself and her son, 'a prophet' being teachings that present truth, as has been shown above.

[8] All that has been said here shows what the Word is like, that it conceals within itself the arcana of heaven, which are not visible in the letter. But every detail of what the Lord spoke when He was in the world, and of what He spoke before that through prophets, contains heavenly and Divine matters on a level altogether above the sense of the letter. And not only individual words contain those matters, but even the individual letters of words, indeed the individual parts of each letter. But is there anyone who believes this to be so? Yet it is most certainly so; it has been proved to me beyond all doubt, as in the Lord's Divine mercy will be shown elsewhere.