It would be most unfortunate to lose sight of one’s spiritual life and ultimate destiny because of paying too much attention to affairs of this world. Even so, the opposite extreme is sad, too: People who, out of a noble desire to focus on their spiritual lives, make the mistake of unduly disdaining knowledge of the world. History is full of examples of very knowledgeable people who were Christians, and one of them, who understood the dangers of both extremes, was Saint Augustine. In”Foolish Christians” (CUA Primer, pages 11–12), he discusses the problem of Christians who bring disrepute on their faith by defending mistaken ideas about the world. What are some areas today in which it is important that Christians seek to learn the best available knowledge about the world? How can learning about the world enhance one’s spiritual life?