“Avenge his foul and unnatural murder” (I.iv.31); the words that changed Hamlet enormously. While Hamlet encounters the ghost of his dead father; he discovers that Claudio, his father's brother, has poisoned him. Hamlet then enacts an act of madness. No one really knows why he went so crazy. Hamlet uses madness as a weapon to avenge his father's death. Returning to sanity, Hamlet's thoughts and actions let us know how and what he is truly feeling. Hamlet oscillates back and forth between sanity and madness, which, ironically, slows down his aching goal of revenge. Hamlet's psychology is only what is in his mind. Shakespeare writes how Hamlet lacks self-esteem at the beginning of his first soliloquy. He wishes his flesh would melt into vapor and he wishes God had not made a law against suicide. It shows how Hamlet moves through a range of emotions in the play, starting with grief, depression, madness, and grief. Not only did old Hamlet's death play a role in Hamlet's “antiquated disposition” (I.iv.192), but so did his mother and uncle. Their incestuous marriage is what leads...