"Augustine (354–430) desperately wanted to know the truth. As
a Christian, he believed in God. But his belief left many ques-
tions unanswered. What did God want him to do? How should
he live? What should he believe? He spent most of his waking
life thinking and writing about these questions. The stakes were
very high. For people who believe in the possibility of spending
eternity in hell, making a philosophical mistake can seem to
have terrible consequences. As Augustine saw it, he might end
up burning in sulphur for ever if he was wrong. One problem he
agonized over was why God allowed evil in the world. The
answer he gave is still a popular one with many believers."