via the Vatican:

Let us never forget this: faith cannot be reduced to a sweetener to make life more palatable. Jesus is a sign of contradiction. He came to bring light to the darkness, exposing the darkness for what it is and forcing it to submit to him. For this reason, the darkness always fights against him. Those who accept Christ in their lives will rise; those who reject him remain in the darkness, to their own ruin. Jesus told his disciples that he came to bring not peace but a sword (cf. Mt 10:34): indeed, his word, like a two-edged sword, pierces our life, separating light from darkness and demanding a decision. His word demands of us: “Choose!” Where Jesus is concerned, we cannot remain lukewarm, with a foot in both camps; we cannot. When I accept him, he reveals my contradictions, my idols, my temptations. He becomes my resurrection, the one who always lifts me up when I fall, the one who takes me by the hand and lets me start anew. He always lifts me up….

This has nothing to do with hostility toward the world, but with being “signs of contradiction” within the world. Christians who can demonstrate the beauty of the Gospel by the way they live. Christians who are weavers of dialogue where hostility is growing; models of fraternal life where society is experiencing tension and hostility; bringers of the sweet fragrance of hospitality and solidarity where personal and collective selfishness too often prevails, protectors and guardians of life where the culture of death reigns.