Jesus not only drives demons out of people, freeing them from the worst slavery, but prevents the demons themselves from revealing his identity. And he insists on this "secret" because what is at stake is the success of his very mission, on which our salvation depends. Indeed, he knows that to liberate humanity from the dominion of sin he will have to be sacrificed on the Cross as the true Paschal Lamb. The devil, for his part, seeks to dissuade him so as to divert him instead toward the human logic of a powerful and successful Messiah. The Cross of Christ will be the devil's ruin, and this is why Jesus always taught his disciples that in order to enter into his glory he must suffer much, he must be rejected, condemned and crucified (cf. Lk 24: 26), for suffering is an integral part of his mission.
Jesus suffered and died on the Cross for love. On close consideration, it was in this way that he gave meaning to our suffering, a meaning that many men and women of every age have understood and made their own, experiencing profound tranquillity even in the bitterness of harsh physical and moral trials.
[Pope Benedict, Angelus 1 February 2009]