LitCharts assigns a color and icon to each theme in Harry Potter and the Cursed Child, which you can use to track the themes throughout the work.
Parenthood
Time, Mistakes, and the Past
Friendship, Family, Love, and Bravery
Reputation and Expectation
Death and Sacrifice
Summary
Analysis
At the Potter House, Harry sits in the kitchen and Ginny rushes out to him, saying that he was screaming. Harry wonders what his dreams mean—he was never in Godric’s Hollow with Petunia. He says that Voldemort came back, and Albus was there, and Voldemort said he was guilty. Ginny asks if Albus is in danger, and Harry, touching his scar, says he thinks everyone is in danger.
Harry’s dream, and his explanation to Ginny, implies that Harry’s trauma in the past is frustrating his ability to connect with his son in the present because he is only concerned with making sure Voldemort can’t return.