Catholic faith, like any other life-forming commitment, is seen in the world. My claim is that Catholic faith helps us see the world as it is.
U think that "Catholicism is realism", I mean that Catholicism takes the world with the seriousness the world deserves – as the arena of God's saving action in Christ. People who imagine themselves "worldly" usually don't get one-half of the world's drama. People who watch "The Passion of the Christ" do.
That's why we have "sacraments", because the world has been made by God in a "sacramental' way. The things of this "real world" can be obtained through the really real world of God's love and grace. The stereotype is that Catholicism demeans the world. On the contrary: Catholicism says that the stuff of this world is the medium through which Christ is present to his people in baptism, the Eucharist, matrimony, and the other "sacraments" of the Church.