 They provide us with a clear outline of the interconnected Neo-Confucian vision of a morally interconnected universe. While the first diagram identifies the Supreme Ultimate (T’aegŭk) as Principle, which generates yin and yang, which then materialise through the Five Elements, the second diagram further concretises this organising aspect of the greater originating Principle in the material world, showing its inherent order that inscribes itself hierarchically. Principle is reflected in all things, and therefore used to validate human social relations and the distinctions that exist between ruler and subjects, older and younger for example. The next three diagrams are all concerned with the basic underpinnings of Confucian moral humanistic education: The Diagram of Elementary Learning, the Diagram of the Great Learning, and the Diagram of Rules of the White Deer Hollow Academy, the latter being the rules of Zhu Xi’s own retreat centre for learning. This education embodies Confucian morality which is the basis for understanding more complex issues of the mind and human nature. The Elementary Learning is an original diagram by T’oegye himself based on Zhu Xi’s text of the same name, which was widely studied in Korea in its own right. Meanwhile, the Diagram of the Great Learning was by Kwŏn Kŭn, appearing in his collection of diagrams mentioned above, bolstering the importance of moral education within the Korean Neo-Confucian tradition.