…philosophy and religion deal with the same basic questions. Christians, and especially evangelical Christians, have tended to forget this. Philosophy and religion do not deal with different questions, though they give different answers and use different terms. The basic questions of both philosophy and religion (and I mean religion here in the wide sense, including Christianity) are the questions of Being (that is, what exists), of man and his dilemma (that is, morals), and of epistemology (that is, how man knows). Philosophy deals with these points, but so does religion, including evangelical, orthodox Christianity.

Francis A. Schaeffer, He Is There and He Is Not Silent, Ch. 1