I am reminded of a book about a girl whose mother is dead and she lives with her father and brother. Before she goes on a plane all by herself, she gets in a fight with her dad. She left without making it up to him and almost gets killed. She felt really bad about it, but eventually makes it up.
We take life fore granted way to much. A.K.A. Fighting with your brother, getting mad at your sister for not letting you hold the puppy when he's asleep etc. etc. After you had goteen mad at her, you wouldn't talk to her. Then you come into the kitchen and see she's fallen off the - refrigerator and died. You'd feel horribly terrible of course.
So, don't take life for granted.