4. In fact, Jesus invites us to discern the words and deeds that bear witness to the imminent coming of the Father's Kingdom. Indeed, He directs and concentrates all signs in the enigmatic "sign of Jonah." In doing so, He overturns the worldly logic that seeks signs confirming man's desire for self-affirmation and power. As the Apostle Paul emphasises, "while the Jews demand miracles and the Greeks seek wisdom, we preach Christ crucified, a scandal to Jews and foolishness to Gentiles" (1 Cor 1:22-23).
As the firstborn among many brothers (cf. Rom 8:29), Christ was the first to overcome in himself the diabolical "temptation" to use worldly means to bring about the coming of the Kingdom of God. This happened from the moment of the messianic trials in the desert to the sarcastic challenge addressed to him while he was nailed to the cross: "If you are the Son of God, come down from the cross!" (Mt 27:40). In Jesus crucified, there is a transformation and concentration of signs: he himself is the "sign of God," especially in the mystery of his death and resurrection. To discern the signs of his presence in history, we must free ourselves from all worldly pretensions and welcome the Spirit who "searches everything, even the depths of God" (1 Cor 2:10).
[Pope John Paul II, General Audience, 23 September 1998]