You may have seen some news stories about the discovery of an ancient text called the Gospel of Judas. I read the article in the New York Times, which seemed to suggest that this new discovery is something that could shake the foundations of Christian belief. Actually, it is nothing more than another text from the Gnostics. Gnosticism was an ancient heresy that rejected orthodox Christian beliefs and replaced them with supposedly secret knowledge reserved to an elite. The idea of being part of a special group "in the know" was one reason it attracted followers. Way back in the second century, St. Irenaeus wrote a long treatise explaining their errors (called "Against Heresies.")
Irenaeus may well have read this Gospel of Judas. So there's nothing new under the sun.
Amy Welborn has some links to more background on this.