Some people are just to stubborn to ever comprehend what someone else says. Stuck on their own beliefs they never allow themselves to ponder issues and when they ponder something they simply let it pass trough their minds without even making the attempt to consider there might even be a value in what others think or say. Nothing exists but what fits their own view of life.
Some people are just to stubborn to ever believe in something else than their own world of thoughts. Whatever exists on the outside has neither substance nor value to them. Science, religion, wisdom are all the same mumbojumbo to them that they discard with a wave of their hand. Whatever shoves their own ignorance into their faces has to be dismissed as worthless drivel otherwise it would shake up their make-belief world.
Some people are just to stubborn to ever allow themselves to see more, to experience more, to ponder anything that lies beyond their own bellybutton. No matter what storm rattles their dwelling they never stop complimenting their navels. As long as their sight stays narrowed in on a single spot they don't have to glance at the whole picture. This way they can remain prejudiced, narrowminded and narrowhearted without ever realizing it themselves.