Anger reminds me that when someone feels entitled to slam a door (or phone) to end a conversation, I am not obligated to open the door again for them. In this relationship, anger reminds me that surviving and flourishing means their silence and entitlement need not manipulate me.
I say this knowing just as Painter or Beatrice are not responsible for my betrayal, lies, and secrets, I am not responsible for theirs. At the end of the day how each of us reacts or responds to others is about our relationship to our emotional selves. Essentially, the ways in which we rigidly grasp our stories, imaginings, and entitlements define how we react or respond to the world around us. It defines everything from our suffering to our joys.