Terry Pratchett said this quote

You say that you people don’t burn folk and sacrifice people anymore, but that’s what true faith would mean, y’see? Sacrificin’ your own life, one day at a time, to the flame, declarin’ the truth of it, workin’ for it, breathin’ the soul of it. That’s religion. Anything else is just . . . is just bein’ nice. And a way of keepin’ in touch with the neighbors.