 First of all, the holy water itself is a sign of the Lord's victory over the evil one. He hates it. He hates holy water. If you go into any place, really, your home or you're traveling in your hotel room or you're in some place and you sprinkle it with holy water, it has a powerful effect. The demons flee, not because it's magic. It's not magic, but it's a tangible, visible effect.