In this fourth chapter of the Book of Jonah, (Jonah 4), the prophet Jonah has a strange reaction to his success. He's angry, and sulky. He thinks he knows better than God does. What is this story about?

Rev. George McCurdy, in his exegesis of this chapter, offers a summary in his Study Guide for the Book of Jonah, which is available for free as a .pdf, for your use. Below, we've excerpted part of his summary, and edited it for use in this context.

The people of the Jewish church in Jonah's time didn't want to reconsider their belief in their "most-favored-nation status." They challenged the Lord. They couldn't understand why He wanted to save their enemies in Nineveh.

Despite the hard lessons in chapters 1 and 2, and his success as described in chapter 3, Jonah still thought he knew better than the Lord. He thought that God was being too soft and loving -- too forgiving -- and that He needed to come around to Jonah’s tougher view.

Jonah got so angry and vengeful that he preferred to die rather than approve of the Lord’s way to save the Ninevites. His self-love wanted shade -- protection for its concepts. The Lord needed to bring such thinking to an end; the worm brought about death to the gourd from within. The Lord then sent a vehement east wind, that represents a blowing away of the stagnant thinking of the church.

The Lord's heavenly sun shone upon Jonah, but he felt faint. Here, Jonah's insistence on his own troubling view of things made him uncomfortable with the Lord’s view. The Divine guidance offered him a way to learn to enjoy the success of his neighbors as his own, but he wouldn't take it.

For us, then -- what? This story is telling us that we can't just keep the truths of the Word for ourselves; we have to go to Nineveh and share them. And then, if people start to hear them, and use them to turn their lives around, we can't allow ourselves to get resentful that the Lord accepts their repentance and forgives them. It's a very human reaction; think of the disciples vying to be first in the Lord's command structure (Luke 9:46), or the brother of the prodigal son (Luke 15:28-29), or the workers in the vineyard who had worked all day for a denarius (Matthew 20:10-12). But... it's not a good reaction. The Lord doesn't admire it in Jonah, and doesn't admire it when it crops up in our minds, either.

Rev. Martin Pennington recommends several explanatory passages from Swedenborg's theological writings:

"Shade or shadow means the perception of good and truth lies in obscurity." (Arcana Coelestia 2367)

"A vine is spiritual good (the spiritual church)". (Arcana Coelestia 217)

"A worm represents falsity gnawing away and tormenting one." (Arcana Coelestia 8481)

"'And the sun grew hot' in the contrary sense means self-love and love of the world." (Arcana Coelestia 8487)

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

2495. It has been stated and shown in many places already that the Word has an internal sense within it that is not seen in the letter. Also the nature of that sense is evident from the explanation given so far from Genesis 1 onwards. Even so, because the few at the present day who do believe in the Word do not in spite of that belief know about the existence of such an internal sense, let further confirmation of it be given.

[2] The Lord describes the close of the age, that is, the final period of the Church, as follows,

Immediately after the affliction of those days the sun will be darkened, and the moon will not give its light, and the stars will fall from heaven, and the powers of the heavens will be shaken. Matthew 24:29; Mark 13:24-25.

That 'the sun' here does not mean the sun, nor 'the moon' the moon, nor 'the stars' the stars, but that 'the sun' means love to the Lord and charity towards the neighbour, 'the moon' faith received from love and charity, and 'the stars' cognitions of good and truth, has been shown in 31, 32, 1053, 1521, 1529-1531, 2120, 2441. Thus these words spoken by the Lord mean that when the close of the age or final period has arrived there will no longer be any love or any charity, or consequently any faith. It is evident that this is their meaning from similar words of the Lord that occur in the Prophets, as in Isaiah,

Behold, the day of Jehovah comes, to make the earth a desolation, and He will destroy its sinners from it. For the stars of the heavens and their constellations will not shine with their light. The sun will be darkened in its rising, and the moon will not give its light. Isaiah 13:9-10.

This too refers to the final period of the Church, or what amounts to the same, the close of the age.

[3] In Joel,

A day of darkness and thick darkness, a day of cloud and obscurity. The earth quaked before Him, the heavens trembled. The sun and the moon were darkened, and the stars withdrew their shining. Joel 2:2, 10.

Here the meaning is similar. Elsewhere in the same prophet,

The sun will be turned into darkness, and the moon into blood, before the great and terrible day of Jehovah comes. Joel 2:31.

In addition in the same prophet,

The day of Jehovah is near. The sun and the moon have been darkened, and the stars have withdrawn their shining. Joel 3:14-15.

In Ezekiel,

When I have blotted you out, I will cover the heavens and darken their stars, I will cover the sun with a cloud, and the moon will not give its light. All the bright lights in the heavens I will make dark over you, and I will put darkness over your land. Ezekiel 32:7-8.

Likewise in John,

When he opened the sixth seal I looked, and behold, a great earthquake took place, and the sun became black as sackcloth made of hair, and the full moon became like blood, and the stars fell to the earth. Revelation 6:12-13.

In the same book,

The fourth angel sounded, so that the third part of the sun was struck, and the third part of the moon, and the third part of the stars, and a third part of them was darkened. Revelation 8:12.

[4] These places show clearly that the Lord's words in the Gospels embody much the same as the Lord's words in the Prophets - namely that in the last times there will be no charity and no faith - and that this is the internal sense. All this is further evident in Isaiah,

The moon will blush, and the sun be ashamed, for Jehovah Zebaoth will reign on Mount Zion and in Jerusalem. Isaiah 24:23.

The meaning here is that faith, which is 'the moon', will blush, and charity, which is 'the sun', will be ashamed because their condition is such; for it cannot be said of the moon and the sun that they will blush and be ashamed. And in Daniel,

The horn of the he-goat grew towards the south, and towards the east, and grew even towards the host of heaven, and it cast down to the earth some of the host, and of the stars, and trampled on them. Daniel 8:9-10.

Here it is evident to anyone that 'the host of heaven' does not mean a host, nor 'the stars' the stars.