There is an idea abroad among moral people that they should make their neighbors good. One person I have to make good: Myself. But my duty to my neighbor is much more nearly expressed by saying that I have to make him happy if I may.
The modern mind tends to be more and more critical and analytical in spirit hence it must devise for itself an engine of expression which is logically defensible at every point and which tends to correspond to the rigorous spirit of modern science.