During the Roddenberry era and beyond religious themes came up occasionally and were often casually dismissed. Consider Neelix's crises of faith when he died, was resurrected, and was devastated to discover no afterlife. He had to be convinced that life was worth living, even without any supernatural escape clause. It is no secret that Roddenberry was an atheist and his Trek universe was reflective of this. What purpose a mystic might serve in a future enlightened and educated society is a bit of a mystery to me.