It's one of the most unique, amazing, and frustrating things the human mind can do. REJECT reality when it fails to conform to previously-held belief. Sometimes, that's a good thing, lets us take calculated risks that may payoff, or ignore things we know aren't true, like optical illusions, or to trust instruments in a car or plane over what our natural senses may be telling us..... but when it backfires, and lets you think that the only reason you aren't succeeding is because you just haven't tried HARD enough, it's a sight to behold.