If one of your friends told you that he found a great job which provides him with house, car, and even solve the local identity problem, will you be jealous? Facing the material temptation, some people would forget and even throw away their dreams. They work hard but only for feed the material satisfaction, to find a balance of life. Based o the reward system, no matter what kind of work you do, it will make you be satisfied and willing to be weak, as your soul and body are kidnapped. For example, you can consider why so many people roll in the civil service examination although you know it is somehow waste of the youth.