To reject revelational epistemology is to commit yourself to defending the truth of autonomous epistemology.
Greg L. BahnsenImagine a person who comes in here tonight and argues 'no air exists' but continues to breathe air while he argues. Now intellectually, atheists continue to breathe - they continue to use reason and draw scientific conclusions [which assumes an orderly universe], to make moral judgments [which assumes absolute values] - but the atheistic view of things would in theory make such 'breathing' impossible. They are breathing God's air all the time they are arguing against him.
Greg L. BahnsenWhen an apologist attempts to be autonomous in his reasoned argumentation he indicates that he considers God to be less certain than his own existence and that he places greater credence in his independent reasoning than in God's Word.
Greg L. BahnsenWe must not be satisfied to present Christianity as the most reliable position to hold among the competing options available. Rather, the Christian faith is the only reasonable outlook available to men.
Greg L. BahnsenThe civil magistrate cannot function without some ethical guidance, without some standard of good and evil. If that standard is not to be the revealed law of God (which, we must note, was addressed specifically to perennial problems in political morality), then what will it be? In some form or expression it will have to be the law of man (or men) — the standard of self-law or autonomy.
Greg L. Bahnsen