What do scenes five and seven suggest about what commitment to taking revenge does to people?
At the same time, though, Laertes' commitment to revenge seems to act like a tonic (of sorts) on his soul, focusing him sharply on what he needs to do to revenge his father. He had been a kinder sort before this; now all that seems stripped away, so he's revenge and little more. In a way it matures him. He's willing to do whatever is necessary to take revenge. In this he's an alternative to Hamlet, who (in other scenes) shows how revenge can cause someone to lose focus.