C137 An Accidental Slump Bites the Teeth of a Dog

I didn't quite understand Diana's judgment. I asked, "Why do you say that?"

Diana stood up and paced back and forth in the room. One hand crossed over her chest while the other hand stood up. "My mother once told me a principle. She said that a biting dog doesn't show its teeth. That means... For those who quarrel with you in front of your face, under normal circumstances