Throughout the book I coted Hamlet becoming insane. At firt he seemed kind of angry with his dad's death and never really cared about the king's position. Soon after when the guards mentioned the ghost being maybe his dad.... After knowing that the ghost was his dad and that it came to tell Hamlet the truth about his death, about being killed by king Claudis, his own brother. Little by little Hamlet became this angry man, with the only thing in his head was, REVENGE for his fathers death....
Horatio: "Now cracks a noble heart. Good night, sweet prince, And filghts of angels sing thee to thy rest." ( act.5 sc.2, 397)
Horatio being his best friend was the one only at the end that could judge Hamlet's actions. Hamlet was only able to trust him at the end and to his own death. He was the only one that saw in Hamlets heart, and thought that what he did was right...