What is Evil? Does it exist? When you speak about the world, do you define an act, a person, or a group as evil? I have called Donald Trump Lord Foul since the 2016 Republican National Convention, by association am I calling him evil? If evil does not exist, then what is that quality we identify as evil? Is evil a treatable sickness, disease, or mental condition? The question of evil is a foundation for good fiction. Science fiction and fantasy fiction settings provide a rich playground to study the question. Is a race of mammals that eats other mammals evil? Orc eats human, human eats pig; evil depends on your perspective.
The Wounded Land, the first book in The Second Chronicles of Thomas Covenant, introduces Linden Avery. She is the most tortured of Stephen R. Donaldson's characters. As a doctor, she has a certain self-assurance that no matter what situation, what disease, or injury she encounters, she has the training and the equipment to treat her patient. Short of those things, she relies on the institutions she belongs to for support. Then she meets a beggar in the driveway to Haven Farm.
Like Covenant before her, the creator of the Land tests Linden Avery. The beggar dies, his heart stops, and Linden does what she is trained to do; she tries to save his life. His breath is foul making CPR a disgusting process, but she does not relent. She cannot go for help, she struggles to the save the beggar, and she fails; her strength fades and she collapses. When she looks up the beggar is standing, he helps her to her feet, hugs her, and vanishes into the sunset.