In 1978, an experiment designed to establish the relationship between high blood cholesterol and heart health in rabbits discovered that being treated with kindness has positive and measurable health benefits. As Kelli Harding reveals, subsequent research shows that love, friendship, community, and our environment can have a greater impact on our health than anything that happens in the doctor's office. Here Harding explains why chronic loneliness can be as unhealthy as smoking a pack of cigarettes a day, napping regularly can decrease one's risk of heart disease, and people with a sense of purpose are less likely to get sick.