AKA: Fuckin' Faith Healers, How Do They Work?
At some point in the creation of The X-Files, someone decided that Mulder would believe in everything except religion, while Scully would be a skeptic but would be solidly religious. It's the sort of simple addition to a concept that puts me in mind of a writer grabbing an extra congratulatory muffin from the basket, but it's always worked. It's not a secret to The X-Files success or something, but it made what might be otherwise straightforward religious themed episodes a little more interesting. Not enough to, you know, save some of the bad ones, but enough to make some of them a little better.