" There is a flow to history and culture. This flow is rooted and has its wellspring in the thoughts of people. People are unique in the inner life of the mind -- what they are in their thought-world determines how they act. This is true of their value systems and it is true of their creativity. It is true of their corporate actions, such as political decisions, and it is true of their personal lives. The results of their thought-world flow through their fingers or from their tongues into the external world. "

― Francis A. Schaeffer , How Should We Then Live? The Rise and Decline of Western Thought and Culture