You should show your parents grace.
John's father Theobold is dying and asks John to come visit him.
John wants his father to know how much he hurt him when he was younger.
John comforts his father, tells him briefly that he forgives his father for any wrongs that occurred and says he loves him.
John visits his dad and tells him how angry he is at him and how he'll never forget all the wrongs he did to him.
Theobold feels loved and forgiven and stays healthy for a longer time.
Theobold is upset and gets sicker and dies thinking John doesn't love him.