" [T]he impulse to connect is both a natural response to stress and a source of resilience. When we care for others, it changes our biochemistry, activating systems of the brain that produce feelings of hope and courage. Helping others also protects against the harmful effects of even chronic or traumatic stress. "

― Kelly McGonigal , The Upside of Stress: Why Stress Is Good for You, and How to Get Good at It