In Act 4, Scene 1 when Claudius asks Gertrude "How does Hamlet?" she tells him that he is as "Mad as the sea and wind", not telling him what Hamlet has admitted to her in the previous scene that he...
Acts chapter 4 is mainly on the trial of Peter and John in front of the people , that is the rules elders, and scribes. Their main complain against Peter and John was that they were preaching about...
This is Ophelia's madscene. It establishes that Ophelia has gone over the edge but also has the more important action in which Laertes confronts Claudius, and is persuaded by him to take his revenge...