The Indians who brought Buddhism to China brought also their tendency to overweight their doctrines with metaphysics and intellectual, logical or theological spinning out of ideas. The Chinese eventually revolted against this tendency, which was completely contrary to their own practical and somewhat earthy outlook. They put all their emphasis on personal inner experience, on the discovery of truth by sudden enlightenment. This was the beginning of Zen.
-- Notebooks Category 15: The Orient > Chapter 3: China, Japan, Tibet > # 12