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.

8678. 'For this reason, that they behaved proudly over them' means because of the endeavour and the force used to exercise control over those belonging to the Church. This is clear from the meaning of 'behaving proudly' as the endeavour and the force used to exercise control, dealt with below; and from the representation of the children of Israel, who are the ones over whom they behaved proudly, as those belonging to the spiritual Church, dealt with above in 8645. The reason why 'behaving proudly' means the endeavour and the force used to exercise control is that kind of endeavour and the force used as a result are present in all pride; for pride consists in loving self more than others, putting self before others, and wishing to rule others. Those who wish to do this also despise others in comparison with themselves, and in addition out of hatred and vengeance persecute others who put themselves before them or do not pay respect to them. The nature of self-love, which is pride, is such that so far as it is given rein it gallops away, gaining speed with every possible step it can take, till eventually it reaches the very throne of God - wishing to usurp God. This is what all in hell are like. What they are like is revealed by their endeavours emanating from there, and also by their intense feelings of hatred for one another and their awful acts of revenge because of their wish to exercise control. That endeavour is one that is curbed by the Lord; and it is what is meant by the head of the serpent which the seed of the woman will tread down, 257. Such spirits also are meant by Lucifer in Isaiah,

How have you fallen from heaven, O Lucifer, son of the Dawn? You have been cut down to the earth, you have been weakened below the nations. And you said in your heart, I will go up the heavens, above the stars of God I will raise my throne, and I will sit on the mount of assembly, in the furthest parts of the north; I will go up above the heights of the clouds, and I will make myself like the Most High. But you have in truth been sent down to hell, to the sides of the pit. You have been cast out of the sepulchre like an abominable branch, [like] a garment of the killed, [like] those pierced with the sword, who go down to the stones of the pit like a dead body trodden underfoot. Isaiah 14:12-19.

[2] The fact that pride of heart, which is self-love, drives the Divine away from itself and puts heaven away from itself becomes perfectly clear from that state in which the Divine and heaven find acceptance, which is a state of love towards the neighbour and a state of humility towards God. To the extent that a person can humble himself before the Lord, to the extent that he can love his neighbour as himself, and - as they do in heaven - above himself, he accepts the Divine and for that reason lives in heaven. From this one can see what the state is of those who love themselves more than their neighbour, and who behave proudly towards him, that is, who are ruled by self-love. One can see that it is a state in which they are opposed to heaven and to the Divine; it is therefore the state in which those in hell live. See what has been stated and shown about self-love in 2041, 2045, 2051, 2057, 2219, 2363, 2364, 2444, 3413, 3610, 4225, 4750, 4776, 4947, 5721, 6667, 7178, 7255, 7364, 7366-7377, 7488-7492, 7494, 7643, 7819, 7820, 8318, 8487.