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.

336. And every mountain and island was moved out of its place. This symbolically means that all goodness of love and truth of faith vanished.

No one can see that this is the symbolic meaning except by recourse to the spiritual sense. It is the symbolic meaning because mountains mean people who possess the goodness of love, inasmuch as angels dwell upon mountains - those motivated by love toward the Lord on loftier mountains, and those motivated by love for the neighbor on less lofty ones. Consequently "every mountain" symbolizes all goodness of love. Islands mean people relatively removed from the worship of God, as may be seen in no. 34 above - here people who are impelled by faith, and not so much by the goodness of love. Therefore in an abstract sense "every island" means, symbolically, all truth of faith. To be moved out of their places means, symbolically, to go away.

It derives from the abodes of angels on mountains and hills, therefore, that mountains and hills in the Word symbolize heaven and the church where love toward the Lord and love for the neighbor are found, and in an opposite sense, hell where self-love and love of the world are found.

[2] It is apparent from the following passages that mountains and hills symbolize heaven and the church where love toward the Lord and love for the neighbor are found, thus where the Lord is present:

Lift up your eyes to the mountains, whence comes your help. (Psalms 121:1)

Behold, on the mountains the feet of him who proclaims... peace! (Nahum 1:15, cf. Isaiah 52:7)

Praise Jehovah..., you mountains and... hills...! (Psalms 148:7, 9)

A mountain of God is the mountain of Bashan; a mountain of hills is the mountain of Bashan. Why do you leap, you mountains, you hills of the mountain? Jehovah has desired to inhabit them; (Jehovah) also will inhabit them forever. (Psalms 68:15-16)

The mountains skipped like rams, the hills like the young of the flock... You travail, O earth, at the presence of the Lord... (Psalms 114:4-7)

I will bring forth a seed from Jacob, and from Judah an heir of My mountains, that My elect may inherit them, and My servants dwell there. (Isaiah 65:9)

(In the consummation of the age:) then let those who are in Judea flee to the mountains. (Matthew 24:16)

(O Jehovah,) Your righteousness is as the mountains of God. (Psalms 36:6)

Jehovah will go forth and fight... In that day His feet will stand on the Mount of Olives, opposite Jerusalem on the east. (Zechariah 14:3-4)

[3] Since the Mount of Olives symbolized Divine love, therefore during the days the Lord preached in the Temple, but during the nights He went out and spent the night on the Mount of Olives (Luke 21:37; 22:39, John 8:1). And therefore the Lord spoke upon that mountain with His disciples regarding His coming and the end of the age (Matthew 24:3, Mark 13:3-4).

Since a mountain symbolized heaven and love, therefore Jehovah came down upon the top of Mount Sinai and proclaimed the Law (Exodus 19:20; 24:17). And therefore the Lord was transfigured before Peter, James and John on a high mountain (Matthew 17:1). Therefore Zion also was located on a mountain, and so, too, Jerusalem, and the two were called the mountain of Jehovah and the mountain of holiness in many places in the Word.

Mountains and hills have similar symbolic meanings elsewhere, as in Isaiah 7:25; 30:25; 40:9; 44:23; 49:11, 13; 55:12; Jeremiah 16:15-16; Psalms 65:6; 80:10; 104:5-10, 13.

[4] That mountains and hills symbolize these loves can be seen still more clearly from their opposite meaning, in which they symbolize hellish loves, namely, self-love and a love of the world, as is apparent from the following passages:

...the day of Jehovah... shall come... upon all the high mountains, and upon all the hills that are lifted up... (Isaiah 2:12, 14)

Every valley shall be exalted and every mountain and hill brought low. (Isaiah 40:4)

The mountains shall be overthrown, and its ascents shall fall... (Ezekiel 38:20-21)

Behold, I am against you, O... mountain, that destroys all the earth... ...I will make you a burnt mountain. (Jeremiah 51:25)

I beheld the mountains, and, lo, they are shaken, and all the hills are overthrown. (Jeremiah 4:23-25)

...a fire is kindled in my anger..., and it will set on fire the foundations of the mountains. (Deuteronomy 32:22)

I will lay waste the mountains and hills... (Isaiah 42:15)

Behold, (O Jacob,) I will make you like a threshing sledge... that you may thresh the mountains and crush them, and make the hills like chaff..., that the wind may carry them away. (Isaiah 41:15-16)

Give glory to Jehovah... before your feet stumble on the dark mountains... (Jeremiah 13:16)

Nor is anything else meant by the seven mountains on which the woman - namely Babylon - sat (Revelation 17:9). And so also elsewhere, as in Isaiah 14:13; Jeremiah 50:6; 9:10; Ezekiel 6:2-3; 34:6.

It can now be seen from this what is meant by the statement that "every mountain and island was moved out of its place," and later by the statement that "every island fled away, and the mountains were not found" (Revelation 16:20, no. 714).