I'm right and you're wrong.
It's funny that people are so repulsed by that statement. Yet we live with that assumption in many areas of life. What is school? It's a series of people who know more about a certain subject telling you that they are right, and you agree with them. How do we teach our children to be moral? We tell them that when they lie, cheat, and steal that they are wrong to do so. I am right and you are wrong. Such a basic principal. If we go to driving school and insist that we should be able to drive through red lights, what would our instructor say to us? That's right. We are wrong and they are right. Now I could ask why this is fine for most people in those spheres of life, but when we make the claim about spiritual things we are horrible people. But instead I'm going to turn it around and ask this… Why don't you apply your insistence that no one knows the truth, and that everyone is right, to the real world? Why don't you tell the IRS that?