We are happier if our relationships with those around us are good. Various research shows that the quality (and not the quantity) of our relations is a source of well-being. It has even been shown that health, vitality, and positive emotion vary in proportion to our feeling in rapport with other people. Precisely those who think of others, take part in their lives, try to alleviate their suffering, and feel linked to them are most likely to be happy and to discover the inestimable treasure of joy.
— Piero Ferrucci, The Power of Kindness