The sign of Jonah goes beyond simply the understanding that Jesus, like Jonah, will spend three days in the belly of Sheol. The Sign of Jonah is only complete when the fish vomits the incorruptible Jonah out.
Jonah flees from God and God’s instruction into a tempestuous chaos. Like Jonah, the natural and consequent result in fleeing from God is that life becomes chaotic, and we are tossed like a ship caught in a tempest upon the sea.
The story is about Jonah’s response to God’s call of redemption and reconciliation of the enemy. Our story is about the depth of God’s grace and mercy towards his disobedient servant Jonah and his rependant enemy Assyria.