In the play, Hamlet, by William Shakespeare, there is more reason to believe that Hamlet was just pretending to be mad. There are two main reasons why this is so. Hamlet, in the beginning says that he will pretend to be crazy in order to avenge his father's death, and the many things he does in order to accomplish this shows that he is not crazy. Also, when he is with people he trusts, it is obvious that his madness is just an act. These two reasons show that Hamlet was just pretending to be crazy.
The fact that Hamlet says he will act crazy and certain things he does in the play shows that he is not really crazy. After meeting with his father's ghost, Hamlet says that he will, "put an antic disposition on" (I,v,192), in order to get revenge for the murder of his father. The quote itself proves he was just acting crazy. Hamlet also thinks of a plan to make the actors act out a play similar to the way his father was murdered to, "make mad the guilty and appall the free" (II,ii591), in order to see if Claudius was really guilty or not. A mad man would not be able to think of a plan like this. Also, when Hamlet finds Claudius kneeling in prayer confessing his sin, Hamlet had a perfect chance to kill Claudius right then and there, but instead he does not. The reason is, if he killed Claudius while he was confessing, the murderer's soul would go to heaven and Hamlet's father would not be revenged. He vows to kill Claudius, "when he is drunk asleep, or in his rage, or in th" incestuous pleasure of his bed" (III,iv,94-95), so that he would go to hell. A crazy person would not have been able to think through all this and would be a lot more impulsive. All of these reasons show that Hamlet's madness was just an act.
When Hamlet is with people he trusts, it is obvious that Hamlet is not really crazy, for he acts like he is insane only around the people he does not trust. When he talks to Ophelia (whom Hamlet does not trust) while being spied on by Claudius and Polonius, Hamlet tells her, "I did love you once" (III,i,125), and right after he tells her this, he says, "I loved you not" (III,i,129).