From New York‘s interview with Justice Scalia:
Q: Have you seen evidence of the Devil lately?
A: You know, it is curious. In the Gospels, the Devil is doing all sorts of things. He’s making pigs run off cliffs, he’s possessing people and whatnot. And that doesn’t happen very much anymore.
A: It’s because he’s smart.
Q: So what’s he doing now?
A: What he’s doing now is getting people not to believe in him or in God. He’s much more successful that way.