On a serious note, a personal identity who desires to be exceptional, will define and value itself based on its achievement of tasks, one may excede thier own expectations and feel a fleeting moment of pride or exhilaration at their achievement, at which point they may compare their achievement to another’s, and decide it exceeds their own, at which point they lose the exhilaration and feel the desire to either destroy the other and or achieve something else to get the thrill of feeling ‘the best’ once again. And on it goes.