One might give a counter-argument like this: “There is a scientist. He works hard. He expects the Nobel Prize and in fact he gets it. He is happy. So this example shows that there is really nothing wrong in anticipating a reward. Where is the question of disappointment in this case?” No, there is nothing wrong, and there is no disappointment either. Granted all that. However, one must remember that pleasure is an interval between two pains. Now this Noble Prize winning scientist is very happy when he first hears the news, goes to Stockholm, picks up the Prize, receives all the accolades, attends innumerable receptions and felicitations etc., and everything looks absolutely fine. What happens some years later? His achievement has become old hat, and he no longer receives the attention and adoration he once got. There are younger scientists and they now are in the news rather than him.