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.

7523. 'And there will be on man and on beast' means the products of interior and exterior evil. This is clear from the meaning of 'man' as the affection for good, and in the contrary sense as the desire for evil; and 'beast' is similar in meaning. But when 'man' and 'beast' are mentioned together, 'man means interior affection or desire and 'beast' exterior; regarding both, see 7424. Interior good or else interior evil, which is meant by 'man', is that connected with intentions or ends in view, for intentions or ends in view are at a person's core, whereas exterior good or else exterior evil, which is meant by 'beast', is that connected with thought and consequently, if nothing stands in the way, with action. Exterior good is meant by 'beast' because a person is in respect of his external or natural man no different from a beast; for he is endowed with similar desires and also cravings, as well as appetites and senses. And interior good is meant by 'man because it is in respect of his internal or spiritual man that a person is a human being, on which internal level he is endowed with affections for what is good and true such as exist with the angels in heaven, and because he controls his natural or animal man, which is 'a beast', by means of that internal man. Regarding the meaning of 'beast' as the affection for good and in the contrary sense the desire for evil, see 45, 46, 142, 143, 246, 714, 715, 719, 776, 2179, 2180, 3218, 3519, 5198.

[2] These things are what are meant by 'man and beast' in the following places too: In Jeremiah,

My anger and My wrath have been poured out on this place, on man and on beast. Jeremiah 7:20

In the same prophet,

I will strike the inhabitants of this city, both man and beast; they will die of a great pestilence. Jeremiah 21:6.

In the same prophet,

It will make her land a desolation, so that none may dwell in it; both man and beast have scattered themselves, they have gone away. Jeremiah 50:3.

In Ezekiel,

When a land has sinned against Me by committing great transgression, I will cut off from it man and beast. Ezekiel 14:13, 19, 21.

In the same prophet,

I will stretch out My hand over Edom, and cut off from it man and beast, and make it a waste. Ezekiel 25:13.

In Zephaniah,

I will consume man and beast, I will consume the birds of the air and the fish of the sea, and the stumbling-blocks with the wicked; and I will cut off man from the surface of the earth. Zephaniah 1:3.

[3] 'Man and beast' stands for interior and exterior good in the following places: In Jeremiah,

I have made the earth, man and beast, by My great strength. Jeremiah 27:5.

In the same prophet,

Behold, the days are coming, said Jehovah, in which I will sow the house of Israel and the house of Judah with the seed of man and the seed of beast. Jeremiah 31:17.

In the same prophet,

A desolation will the earth be, so that man and beast are not there. Jeremiah 32:43.

In the same prophet,

In the cities of Judah, and in the streets of Jerusalem, that have been devastated, there is no man and inhabitant, and there is no beast. Jeremiah 33:10; 51:62.

In David,

Your righteousness is like the mountains of God, Your judgements a great deep; You preserve man and beast, O Jehovah. Psalms 36:6.

It was because 'man and beast' meant such things that the firstborn of the Egyptians died, not only of men but also of beasts, Exodus 12:29, and that the firstborn were consecrated [to Jehovah], not only of men but also of beasts, Numbers 18:15, and also that the king of Nineveh, following sacred religious practice, commanded that not only man but also beast should fast and also be clothed in sackcloth, Jonah 3:7-8.