Lecture VI

Because the lung has remained a kind of retarded metamorphosis of the head formation it is adapted to its own function, i.e., breathing. If the same forces that remain retarded in the lung, making it suitable for breathing, develop further, they render the lung more and more head-like. A consequence of the lung becoming more and more head-like is that it takes in thought forces—the organic forces of thinking—and strives to become a thinking organ. In trying to become a thinking organ, taking up too strongly the forces properly seated in the head, the lung becomes disposed to tuberculosis.