Classical apologetics takes a two-step approach to commending the Christian picture of reality. First, arguments for the existence of God, such as those of natural theology, are employed to create common ground with people outside the household of the Christian faith and to provide intellectual support for Christians. Second, classical apologetics defends key items of Christian revelation, including the reliability of the Bible, the identity of the historical Jesus, and the resurrection of Jesus Christ from the dead.

In the Knowledge of God in the World and the Word Workbook, designed to be used alongside the Knowledge of God in the World and the Word textbook by authors Douglas Groothuis and Andrew I. Shepardson, students are guided through learning exercises that introduce them to classical apologetics and to innovative defenses of natural theology.