John Vissers explores Jonah's profound disappointment with God after the repentance of Nineveh, highlighting Jonah's anger and resentment towards God's mercy. Despite being a prophet who experienced God's grace, Jonah struggles with the reality that God chose to spare the Ninevites, leading him to question God's fairness and withdraw from his mission. Vissers emphasizes the contrast between Jonah's self-centeredness and God's compassion, urging listeners to reflect on their own responses to God's unexpected actions. The sermon concludes with a call to embrace God's grace and celebrate His mercy rather than succumbing to bitterness and disappointment.