The love of humanity is a thing supposed to be professed only by vulgar and officious philanthropists, or by saints of a superhuman detachment and universality. As a matter of fact, love of humanity is the commonest and most natural of the feelings of a fresh nature, and almost every one has felt it alight capriciously upon him when looking at a crowded park or a room full of dancers. The love of those whom we do not know is quite as eternal a sentiment as the love of those whom we do know. In our friends the richness of life is proved to us by what we have gained; in the faces in the street the richness of life is proved to us by the hint of what we have lost.
— G. K. Chesterton, from Robert Browning