" We are all wired with a natural propensity to learn, grow, and expand. Think of the positive things that make you happy, bring you joy, deepen your understanding, and make you feel wonderful. These things enlarge and grow with positive energy, don’t they? The opposite is true as well; negative things make us feel stressed, sad, angry, or overwhelmed. They leave us feeling depleted and contracted. "

― Susan C. Young , The Art of Body Language: 8 Ways to Optimize Non-Verbal Communication for Positive Impact (The Art of First Impressions for Positive Impact, #3)