Paul’s encounter with the glorified Lord on the way to Damascus convinced him that Jesus had died and risen for him and for all. The mystery of the Cross showed him the power of God’s merciful and saving love. As Paul told the Corinthians, he came not to preach in lofty words or wisdom, but to proclaim "Jesus Christ, and him crucified".
As the supreme sign of God’s love for sinful humanity, the Cross invites us to that true wisdom which accepts the free gift of God’s merciful and saving love. On the Cross Christ gave himself up for our sins, becoming a sacrifice of atonement in his own blood.
For Paul, faith in the crucified Lord thus calls us to crucify our own flesh with its desires, in order to share in Christ’s death and resurrection. In accepting the weakness of the Cross, we experience the power of God’s love for us.
-Catechesis of Pope Benedict XVI on Wednesday, October 29th.