Lecture II-V
As a result, we entered the fifth age with a science of the external world that began its great rise to ascendancy in the thirteenth and fourteenth centuries. We see this, for example, with the Scholastics. We experience in their thought the dawning of a new science that is, however, wholly chained to the sense world, that is unable to go even a step beyond the sense world. Thus we see how the split appears between faith and knowledge. Augustine was not able to understand a reference to something spiritual standing behind the sun. He did not understand Manicheism because it speaks of the veil of the senses spread over the spiritual. He could believe in Christ who had descended into a physical man. But faith and knowledge had entirely split apart at that time. All believers who stood on medieval science wanted faith and knowledge entirely separated.
Cite:
GA 104a/1909-05-14/p009 · edition English