Book III: Chapter 1 The Three Parts of Morality Summary and Analysis

Morality is made up of three parts, according to Lewis. The first part is the relationships between human and human, the part of morality that most people think about. The second is the inner human, an individual's care of self. Lewis likens this to an ocean-going ship and how well the engines run, the steering gears work, and everything which makes the craft seaworthy. The third part of morality consists of the relationship between a human and the power that made the human.

Lewis believes that the problem with morality is that most people only think about the first part, their relationships with each other. A common rationalization is if a person does no harm to another person, the behavior in question must be moral. Lewis uses...