" Feeling threatened can easily lead to feelings of anger and hostility and from there to outright aggressive behavior, driven by deep instincts to protect your position and maintain your sense of things being under control. When things do feel “under control,” we might feel content for a moment. But when they go out of control again, or even seem to be getting out of control, our deepest insecurities can erupt. At such times we might even act in ways that are self-destructive and hurtful to others. And we will feel anything but content and at peace within ourselves. "

― Jon Kabat-Zinn , Full Catastrophe Living: Using the Wisdom of Your Body and Mind to Face Stress, Pain, and Illness