There is one thing all unbelievers have in common—unbelief. But there are many types of unbelievers. There are those unbelievers who cling to a false religious system. Yet while others have no well thought out reasons, there are many who are quite confident in their unbelief appealing to certain philosophical and scientific arguments. How well are you prepared to answer the various kinds of people with their questions and criticisms? Beginning this series titled Defending Your Faith, Dr. Sproul introduces us to the ancient Christian apologists and the challenges they faced as they sought to give a reasoned defense of the Christian faith.