“The Three Parts of Morality” by CS Lewis.

“Morality, then, seems to be concerned with three things: Firstly, with fair play and harmony between individuals. Secondly, with what might be called tidying up or harmonizing the things inside each individual. Thirdly, with the general purpose of human life as a whole: what man was made for: what course the whole fleet ought to be on: what tune the conductor of the band wants it to play. You may have noticed that modern people are nearly always thinking about the first thing and forgetting the other two.” (CS Lewis, Mere Christianity, “The Three parts of morality.”)