In response to Jonah's outburst, God gives him an object lesson. God causes a vine to grow up, protecting Jonah from the scorching heat. It says that Jonah was "very happy about the vine." At dawn the next day, God used a worm to kill the vine, and Jonah was so upset by this turn of events that he wanted to die. In the end we see that people are God's highest priority, and should be ours as well.