It is one of the marks of the evolution of the race that we are coming more and more into sympathy with the objects of the external world. These things are a part of our lives. They are central to our thoughts. The happiest life has the greatest number of points of contact with the world, and it has the deepest feeling and sympathy for everything that is. The best thing in life is sentiment; and the best sentiment is that which is born of the most accurate knowledge.