With different numerical categories, different patterns are formed to concretely express Chih-i’s idea of what a perfect harmonization philosophy should be. First, the use of the category number ten stands for the visual image of completeness in terms of horizontal and vertical dimensions. Second, the use of the category number six is to unfold Chih-i’s perfect harmonization philosophy with the pattern of succession that denotes the nature of completeness. Third, the use of the category number five draws a pattern of circle akin to the five periods of the teachings of the Buddha that can be considered as occupying the five directions. We discern that Chih-i’s use of numerical category five denotes the affirmation of all teachings of the Buddha, while emphasizing the supremacy of the Lotus Sūtra as the centralizing force. Fourth, the use of the category number four depicts a pattern of a square, with which all the Buddhist doctrines are legitimated. Fifth, the use of the category number three draws a pattern of circle, denoting an integrated reality, in which all three aspects of the Threefold Truth are mutually identified. Sixth, the use of the category number one is to bring forth the Ultimate Truth as the representation of the single reality of Buddhahood. Thus, we come to a conclusion that these six numerical categories depict Chih-i’s perfect harmonization philosophy in terms of non-separation, non-differentiation, mutual identification, affirmation of all existing things, and integration of all aspects of reality. (Page 133-134)