In the world of dreams the rules of reality do not necessarily apply. Each dream is unique and it's a direct link to the soul and spirit. Psychology provides its own theories on what dreams mean, but so did tradition and the study of dreams for thousands of years before any relevant science had developed.
Dream Meanings - Preacher
If you see a preacher reading the Bible, someone will help you solve a personal issue through their guidance and support. If you dream that you are a preacher then be careful what you say as you could end up exposed.