Lecture II
In the course of the last centuries, however, since the middle of the fifteenth century, mankind reached a point where, in a sense, it increasingly sank down into itself. It permitted the soul-spiritual aspects to fall asleep and allowed itself to become immersed in the substantiality of the corporeal element. People were content to think merely with the physical brain, to set the brain on an automatic course, just as the brain of the professor, sitting at his lectern, functions automatically. The brain automaton above is followed below by the brain automata of the students. Whole groupings of human beings switched over to this merely automatic materialistic functioning of the brain, namely, physical thinking. They sank deeper and deeper into the corporeality, and did not activate themselves from within to quicken the comprehension for what is derived from the super-sensible world. This has been the growing trend among the people of the so-called civilized world since the middle of the fifteenth century. And by the middle of the nineteenth century, just that particular segment of humanity which is called intellectual in the civilized parts of Europe and America had turned into physical thinkers.