Recently, Supreme Court Judge Antonin Scalia was mocked by the media for revealing in a New York Magazine interview that he believes in the devil.
You would have thought he had proclaimed that the world is flat and sun revolves around the earth. In 2013 America the Devil is only real on October 31 when you see him trick or treating through the neighborhood. The other 364 days of the year he doesn't exist.
How very convenient.
In the current public sphere, speaking of God is considered divisive and speaking of the Devil is considered kooky.
As Judge Scalia said, since Jesus himself believed in the Devil, those of us who believe the Devil is real are in good company.
For those of you who belief that the Devil is just a made up boogie man, congratulations on falling hook, line, and sinker for a basic deception. It is an easy deception to unmask, but it is much more convenient to go through life pretending the Devil and his opposition to God is not real.
Determining the Devil is for real is not that hard. I would recommend you read any of the following books to open your eyes.
The Screwtape Letters by C.S. Lewis. A perennial classic, as relevant today as it was in in 1942.