1. Plato, Books II, VI–VII (the Form of the Good)
2. Aristotle, Books I, II, X
3. Epictetus, ; Book II
4. Augustine, Book VII; on Faith, Hope, and Love
5. Aquinas, I-II, Questions 18–21, 71–74
6. Hobbes, , Part I Chapter 6
7. Kant, , Section I; Religion within the Limits of Reason Alone
8. Mill, , Chapters II, IV
9. Freud,