“Sniffing “but this is the twenty-first century” in the face of this evidence and the teaching of the Church is exactly like sniffing “But this is Tuesday!” The calendar has nothing to do with whether God created immortal spirits called “angels.” It has nothing to do with the fact that some of them abused their free will, rejected God and his creation (including us), and thereby became what we call devils. And it has nothing to do with the fact that to this day, Satan remains what Jesus called him: “a murderer from the beginning . . . a liar and the father of lies.” The rationalist skeptic, so far from being an advance in the age, is several millennia behind the times, and is clueless as to the nature and extent of just what “powers” may be at work when a human being dabbles in the occult. The rationalist and the occultist are both fools in their own way. The occultist claims to “summon spirits from the vasty deep” and the rationalist tartly replies “yes, but will they come when you call?””
– Mark Shea