Narcisism

I think humans have a natural tendency to want to be right all the time. When our behavior does not align with what we know to be true, we experience something called cognitive dissonance. The difference that distinguishes narcissists is how people deal with this feeling. Narcissists rationalize the situation until they have developed a belief system, potentially divergent from reality, that maintains their superiority. In contrast, normal people admit they have made a mistake, attempt to correct it if possible, and adjust their world view to hopefully decrease the likelihood of making the same mistake in the future.