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.

2243. 'Whether they have brought it to a close according to the cry of it which has come to Me; and if not, I will know' means whether evil has reached its peak. This is clear from the meaning of 'cry' as falsity, dealt with just above in 2240. There are two kinds of falsity, as was mentioned at the end of that paragraph, namely falsity which comes from evil, and falsity which produces evil. Falsity coming from evil consists in everything a person thinks while he is subject to evil, that is to say, everything which supports evil. For example, when a person is subject to adultery he thinks that adultery is permissible, that it is right and proper, that it is the delight of life, that the birth of offspring is promoted by it, and many other ideas such as these. These are all falsities coming from evil.

[2] Falsity which produces evil however comes about when a person holds to some tenet of the religion he belongs to and as a consequence believes that it is good or holy, when in fact in itself it is evil. For example, a person who believes from his religion that some human being is able to save, and who therefore worships and venerates that human being, creates evil out of that falsity. The same applies to any other religious persuasion which in itself is false. Since falsity therefore both derives from evil and produces evil the word 'cry' occurs here and means, as a kind of general term, that which is implied by it, namely evil. This is also evident from the fact that the words 'whether they have brought it to a close according to the cry of it which has come to Me' include both 'the cry of it' in the singular, and 'they have brought it to a close' in the plural.

[3] What a close is has been shown in Volume One, in 1857. What more is implied by a close may be ascertained from the history of the Churches. The Most Ancient Church, which was called Man, was the most celestial of all, yet that Church in course of time so declined from the good that flows from love that at length nothing celestial was left. At this point it came to its close which is described by the state of those people prior to the Flood.

[4] The Ancient Church, which came after the Flood, and was called Noah, and was less celestial, also in course of time so fell away from the good flowing from charity that no charity at all was left; for it was changed partly into magic, partly into idolatry, and partly into a system of doctrine separate from charity. At that point it reached its close.

[5] Another Church then followed which was called the Hebrew Church and was less celestial and spiritual still, making a certain kind of holy worship consist in external religious observances. This Church as well was in course of time perverted in varying ways, and that sort of external worship was turned into idolatrous worship. At that point it reached its close.

[6] A fourth Church was established after that among the descendants of Jacob, which did not possess anything celestial or spiritual, only that which was the representative of such. Consequently that Church was a Church representative of celestial and spiritual things, for what their religious observances actually represented and meant they did not know. But that Church was established in order that some link might nevertheless exist between man and heaven, like that which exists between the representatives of good and truth, and good and truth themselves. This Church so went off in the end into falsities and evils that every religious observance became idolatrous, at which point it reached its close.

[7] Therefore once those consecutive Churches, each declining as indicated, had come and gone - and in the last of them the link between the human race and heaven had become severed so completely that the human race would have perished because no Church existed to provide such a link and a bond, see 468, 637, 931, 2054 - the Lord came into the world; and through the Divine Essence united to the Human Essence within Himself, He joined heaven and earth together. At the same time He established a new Church, called the Christian Church, in which, to begin with, good that is the fruit of faith was present, and people lived together in charity as brethren. But with the passage of time it departed in different directions, and today has become such that people do not even know that faith is grounded in love to the Lord and charity towards the neighbour. And although they assert from doctrine that the Lord is the Saviour of the human race, that they will rise again after death, and that there is a heaven and a hell, few nevertheless believe these things. Since this Church has become such, its close is not far away.

[8] These considerations show what the close is, namely that it is the time when evil has reached its peak. The situation is similar in particular, that is, with each individual; but how the close or climax comes about in the case of the individual will in the Lord's Divine mercy be discussed later on. Various places in the Word refer to the close and describe the state which comes before it as vastation and desolation, which is followed by visitation.