Christian Reflections

Now, his own reason has become the object: it is as if we took out our eyes to look at them. Thus studied, his own reason appears to him as the epiphenomenon which accompanies chemical or electrical events in a cortex which is itself the by-product of a blind evolutionary process. His own logic, hitherto the king whom events in all possible worlds must obey, becomes merely subjective. There is no reason for supposing that it yields truth.

Until modern times no thinker of the first rank ever doubted that our judgments of value were rational judgments or that what they discovered was objective. It was taken for granted that in temptation passion was opposed, not to some sentiment, but to reason