Fixed or growth mind
Then Hamlet discovers that his uncle the one to blame for the death of his father. Hamlet's mind diverted from grieving to getting revenge. All Hamlet can think about is exposing his uncle and trying to figure out if he really did kill his father. He does this by having play characters re-enact the scenario of the murder of king Hamlet. "My father's spirit in arms. All is not well./I doubt soul play.Would the night were come./ Till then sit still, my soul/ Foul deeds will rise." (1.2.254.) what Hamlet means here is that he should discover is the foul play is real or a hoax. His soul should stay calm because if the foul deeds are indeed true then bad deeds shall arise. As the play goes on, he discovers that and he goes on this adventure. If Hamlet had a fixed mindset, I believe there would be no story because he would not go on this chase and leads him to witness all this bad luck and eventually his own self-destruct.