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.

3596. 'And have blessed him? Indeed, he will be blessed!' means that it was indeed joined to it. This is clear from the meaning of 'being blessed' as being joined to, dealt with in 3504, 3514, 3530, 3565, 3584. What is implied by making its own and joining to itself the truth represented by 'Jacob' may become clear from what has been stated already. But because these matters are such as to be beyond the range of anything grasped by the natural man and so cannot be seen except in the light in which the rational or internal man sees - a light in which few see at the present day because few are regenerate - it is better not to elucidate them any further, for the elucidation of things which are not known and which go beyond the range of a person's understanding does not throw light on them but rather puts them in the shade. What is more, such things ought also to exist as a superstructure built upon ideas of natural truths by means of which they can be grasped; but these ideas too are lacking at the present day. This also explains why the phrases prior to that under discussion here have been explained so briefly and solely as to the internal sense of the words used.

[2] From what has gone before one may see what is embodied in the fact that Isaac asked for venison from his son so that he might eat of it before he blessed him; and that he did not bless him until after he had eaten; and thus that after he had eaten there followed the blessing of the one who made and brought him the food, as is also evident from Isaac's words here spoken in reference to Jacob, 'He brought it to me and I have eaten from all of it before you came in, and have blessed him. Indeed, he will be blessed!' The reason is evident from an internal understanding of the rituals of the Ancient Church With them 'eating' meant making one's own and being joined to - joined to him at whose house they had eaten, that is, shared his bread. 'Food' means in general those things which are the signs of love and charity, that is, the very things that constitute celestial and spiritual food - 'bread' in that case meant things that are the sign of love to the Lord, and 'wine' those that are the sign of charity towards the neighbour. When these things had been made their own, those persons were joined together. They accordingly talked to one another from affection and shared one another's company. Feasts among the ancients were nothing else than this; the meals of consecrated things in the Jewish Church represented nothing else; and the meals at midday or in the evening which those in the Primitive Christian Church took together did not entail anything else.