Willy Loman teaches his son Biff that the accumulation of wealth is the ultimate measure success, and that one can get by on charm and good looks. He spoiled Biff, leading him to believe that he could behave any way he wanted. Unfortunately, this all unravels when Biff discovers Willy is having an affair. In one moment, his world is shattered. Although he plays into Willy's schemes to make money throughout the play, behind every action is the resentment and anger he has built up against his father. After discovering the affair, Biff rejects his father’s offer to convince the math teacher to let Biff graduate. Biff is betrayed by his father's emptiness and selfishness, and he can no longer idolize Willy or believe in his version of the American Dream. This spirals into a life of failure and drifting, which reflects Willy's own failures in business, and the tragedy of his never achieving the American Dream. Because they never achieve their ideal success, Biff recognizes his failure to live up to his own standards and the way he has hurt his father to get revenge for his betrayal.