2) The book of Jonah announces to us the event of Jesus Christ - Jonah is a foreshadowing of the coming of Jesus. The Lord himself tells us this in the Gospel quite clearly.
Asked by the Jews to give them a sign that would openly reveal him as the Messiah, he replies, according to Matthew: "No sign will be given to this generation except the sign of Jonah the prophet. For as Jonah remained three days and three nights in the belly of the fish, so shall the Son of Man remain three days and three nights in the heart of the earth" (Matthew 12:39f).
Luke's version of Jesus' words is simpler: "This generation [...] seeks a sign but no sign will be given to it except the sign of Jonah. For as Jonah was a sign to those of Nineveh, so also the Son of Man will be a sign to this generation' (Lk 11:29f). We see two elements in both texts: the Son of Man himself, Christ, God's envoy, is the sign. The paschal mystery points to Jesus as the Son of man, he is the sign in and through the paschal mystery.
In the Old Testament account this very mystery of Jesus shines through quite clearly.
The first chapter of the book of Jonah speaks of a threefold descent of the prophet: he goes down to the port of Jaffa; he goes down into the ship; and in the ship he puts himself in the innermost place. In his case, however, this threefold descent is an attempted escape before God. Jesus is the one who descends out of love, not in order to flee, but to reach the Nineveh of the world: he descends from his divinity into the poverty of the flesh, of being a creature with all its miseries and sufferings; he descends into the simplicity of the carpenter's son, and he descends into the night of the cross, and finally even into the night of the Sheòl, the world of the dead. In doing so, he precedes us on the way of descent, away from our false kingly glory; the way of penitence, which is the way to our own truth: the way of conversion, the way that leads us away from Adam's pride, from wanting to be God, towards the humility of Jesus who is God and for us strips himself of his glory (Phil 2:1-10). Like Jonah, Jesus sleeps in the boat while the storm rages. In a way, in the experience of the cross he allows himself to be thrown into the sea and thus calms the storm. The rabbis have interpreted Jonah's word "Throw me into the sea" as a self-offering of the prophet who wanted to save Israel with this: he was afraid of the conversion of the pagans and of Israel's rejection of the faith, and for this reason - so they say - he wanted to let himself be thrown into the sea. The prophet saves in that he puts himself in the place of others. The sacrifice saves. This rabbinic exegesis became truth in Jesus.
[Pope Benedict Card. Ratzinger, Lectio in st Maria in Traspontina, 24 January 2003; in "30Days" February 2003]
