Do you value liberty, reason, science, individualism and progress? If so, read this short book by Christian philosopher Francis Schaeffer to learn why these and other western values are hanging in the balance today. Schaeffer offers an explanation of the Renaissance, Reformation and Enlightenment that is in agreement with the traditional view of history that our most cherished western values are fruits of our Judeo-Christian tradition. This view has been promoted by such thinkers as Burke, Tocqueville and Acton. An excellent modern defense is given by M. Stanton Evans in his book The Theme is Freedom. Schaeffer's treatment is philosophically deep and historically broad, although the book's short length severely limits consideration of detail.
Schaeffer sees the true beginning of the humanistic Renaissance in the work of Thomas Aquinas (1225-1274). Aquinas' dualistic Grace/Nature scheme was useful in many ways, but its critical flaw was in failing to recognize man's fallen intellect along with his fallen will. Aquinas saw man's intellect as essentially undamaged by the Fall. This had the unfortunate consequence of setting up man's intellect as autonomous and independent.
Aquinas adapted parts of Greek philosophy to Christianity, perhaps most importantly (and with the most negative consequences) the dualistic view of man and world as represented by the Grace/Nature split. As Schaeffer stresses, the main danger of a dualistic scheme is that, eventually, the lower sphere "eats up" the upper sphere. Another way to say the same thing is, once the lower sphere is given "autonomy," it tends to deny the existence or importance of whatever is in the upper sphere in support of its own autonomy.
Schaeffer explains how the Grace/Nature dualism eventually became the Freedom/Nature, then the Faith/Rationality split. He introduces his interesting idea of the Line of Despair, which began in philosophy with Hegelian relativism. Kierkegaard was the first major figure after this line. The line of despair is the point in history at which philosophers (and others) gave up on the age-old hope of a unified (i.e. not dualistic) answer for knowledge and life.
This new despairing way of thinking spread in 3 ways; geographically, from Germany outward to Europe, England and finally much later to America. Then by classes, from the intellectuals to the workers via the mass media (the middle classes were largely unaffected and remained a product of the Reformation, thankfully for stability, but this is why the middle class didn't understand its own children). Finally, it spread by disciplines; philosophy (Hegel), art (post-impressionists), music (Debussy), general culture (early T S Eliot)...then lastly theology (Barth).
Once this way of thinking set in, Schaeffer explains the need for "the leap," promoted by both secular and religious existentialists. On the secular side, Sartre located this leap in "authenticating oneself by an act of the will," Jaspers spoke of the need for the "final experience" and Heidegger talked of 'angst,' the vague sense of dread resulting from the separation of hope from the rational 'downstairs.' On the religious side, we have Barth preaching the lack of any interchange between the upper and lower spheres, using the higher criticism to debunk parts of the Bible, but saying we should believe it anyway. "'Religious truth' is separated from the historical truth of the Scriptures. Thus there is no place for reason and no point of verification. This constitutes the leap in religious terms. Aquinas opened the door to an independent man downstairs, a natural theology and a philosophy which were both autnomous from the Scriptures. This has led, in secular thinking, to the necessity of finally placing all hope in a non-rational upstairs" (p. 53, thus the book's title). This is in contrast to the biblical and Reformation message that even though man is fallen, he can and must search the scriptures to find the verifiable truth. Schaeffer devotes alot of space in his book to illustrating the many ways modern men have taken this "leap," assuming there is no rational way upstairs.
Schaeffer ends with a call to reject dualism and return to the reformation view of the scriptures, which is that God has spoken truth not only about Himself, but about the cosmos and history (p. 83). In order to do this, man must give up rationalism (i.e. autonomous reason), but by doing so he can retrieve rationality. "Modern man longs for a different answer than the answer of his damnation. He did not accept the Line of Despair and the dichotomy because he wanted to. He accepted it because, on the basis of the natural development of his rationalistic presuppositions, he had to. He may talk bravely at times, but in the end it is despair" (p. 82). No area of life can be autonomous of what God has said, since this will inevitably lead to the destruction of all value (including God, freedom and man). By placing all human activity within the framework of what God has told us, "it gives us the form inside which, being finite, freedom is possible" (p. 84).
God created man as significant, and he still is, even in his fallen and lost state. He is not a machine, plant or animal. He continues to bear the marks of "mannishness" (p. 89): love, rationality, longing for significance, fear of non-being, and so on. He will never be nothing.
The author emphasizes the existence of certain unchanging facts, which are true regardless of the shifting tides of man's thoughts. He challenges Christians to understand these tides and speak the unchanging truth in a way that can be understood in the midst of them.