Ssssshhhhhh...........that's supposed to be a secret............not too many of us are "in" on that one.
Let's enlighten those that think it's such a secret society shall we?
http://www.opusdei.org/
Take a look around the site and you will see how "scary" this organization really is. GASP! They even suggest going out and spreading the gospel of Jesus Christ. The horrors of it all! ;.)