The problem with preachers is that they won’t let truth remain private. They insist on proclaiming their view of truth to others, and that is what people find so offensive. Some people see preaching as a kind of intellectual rudeness, a violation or rape of the mind and of the soul, beyond excuse. If you seek to persuade me of your view of truth, you are asking me to abandon my view of truth. You are telling me that my way is inadequate or improper, and it is hard not to take that personally. It feels like rejection.