Very difficult to get into this book with all the deep philosophical development, but it ended well. If I understand Schaeffer correctly... the, not so surprising, presupposition of the unbeliever in modern culture is no longer that truth is absolute nor is God personal or even there at all. So the evangelical then, instead of leading by arguing for truth, should engage them in exploring the depths of their ideologies below the "line of despair". Then, when they reach the inevitable hopelessness of their human plight... we then introduce them to the truth and love of a "God who is there"... not just intellectually, but in loving relationship. Interesting... I WILL test this theory.