The great belief in not believing. It's brash, it's brave, it's increasingly popular and it's upsetting the faithful left and right. Let's have a quick look at the A-word.

Religious creeds are pretty unambiguous—and bound by theologies that dictate a commonly embraced group of precepts, mores and behaviors. There's an afterlife or there is not. Jesus has come already or he hasn't. There is one God or there are many. Atheism takes this platform for defining faith, chews it up and spits it out.

The leading organization advocating for atheist civil liberties comes to defining their "creed" as "a lack of belief in gods and supernatural beings." American Atheists go on to add, "every atheist is as unique as a fingerprint when it comes to his or her individual philosophy, convictions, and ideals."

While churchgoers, or "theists" as they are called at AA, are preparing for Good Friday and Easter with crucifixes, palm fronds and other signs of the faith, David Silverman of AA said non-believers will be doing no such thing.

This year marks what is possibly the first major Christian holiday under a President who acknowledges non-believers—since the Founding Fathers. Silverman elucidated the origins of the Easter in a recent telephone conversation. "Easter is not really a Christian holiday. It's a pagan holiday. That's where bunnies come from and Easter eggs." In a nod to the times, he added that "it's a very good time to be an atheist."