How we cite our quotes: All quotations are from The Shining.
Quote #4
JACK: I did hurt him once, okay? It was an accident, completely unintentional. It could have happened to anybody.
Jack is willing to admit that he injured his son once. But he's not convinced that this makes him an abusive dad. In his mind, he just had a temporary loss of control over his strength. But a child services worker might disagree with him on this.
Quote #5
JACK: Darling, light of my life, I'm not going to hurt you. You didn't let me finish my sentence. I said I'm not going to hurt you... I'm just going to bash your brains in!
By this point in the movie, it's pretty clear that Jack has completely snapped and that's a danger to his wife and son. Luckily, Wendy is able to smack him unconscious with a bat before he can hurt her. After all, it sounds like he'd like to do a lot worse to her.