"Many bad players will not improve because they cannot bear self-knowledge. Finally, they cannot bear the notion that everything they do is done for a reason. The bad player will not deign to determine what he thinks by watching what he does. To do so might, and frequently would, reveal a need to be abused (in calling what must be a superior hand); a need to be loved (in staying for "that one magic card"); a need to have Daddy relent (in trying to bluff out the obvious best hand); et cetera.
It is painful to observe this sort of thing about ourself. Many times we'd rather suffer on than fix it. It's not easy to face that, rather than playing cards in spite of our losses, we are playing cards because of them." - David Mamet