Something greater than Jonah is here. Whereas Jonah said he’d rather die than go to sinners, Jesus said He would go to sinners so that He could die. Whereas Jonah was thrown into the sea to appease God’s wrath against him, Jesus was thrown into the sea of God’s wrath to appease His anger against us. Jonah was in the belly of a fish for three days and nights and vomited out, but Jesus was in the belly of the grave for three days and nights and then resurrected out.
Jonah preached his message, and the people of Nineveh repented with uncertain hope of forgiveness (Jonah 3:9). Jesus preached the gospel of the cross, which promises us, if we confess our sins, that God is faithful and just to forgive us (1 John 1:9). God used Jonah to spare one city, but Jesus came to save people from every tongue, tribe, and nation. Indeed, Someone much greater than Jonah is here.
If an entire wicked city repented at the preaching of Jonah, why should you have hope that many sinners might repent in response to your sharing of the gospel?