Totally tongue-in-cheek! Blame it on the mountain air. But I think there’s some truth in it, especially when referring to upwardly mobile religious people:
Pentecostals want to be Baptists
Baptists want to be Methodists or Presbyterians
Methodists and Presbyterians want to be Episcopalians
Episcopalians want to be Roman Catholics
Roman Catholics want to be Pentecostals.