When Gretta Vosper steps on stage at the University of North Georgia’s Hoag Auditorium, some in the audience may be skeptical. Some may be intrigued. All Vosper asks is they have an open mind. The not-so-typical minister at the 80-plus-member West Hill United Church of Canada will be in town for the summer portion of the university’s Mountain Top Lecture series at 9:30 a.m. Saturday, Aug. 25. She’s a self-proclaimed atheist who believes “the way you live is more important than what you believe.”