The last category of Objects as the One Truth concludes various categories of Objects as truth, stressing that there is only one Ultimate Truth. In Chih-i’s understanding of truth, truth itself is abstract, it does not have a fixed term, and it cannot be understood conceptually. Therefore, truth can only be presented in relation to the understandings of beings. Only with the supreme ability of understanding, can one fully conceive truth. With this assumption, Chih-i not only systematically presented various categories of Objects as truth, but also offered us a system of classifying various levels of attainment that are associated with these truths. This indicates that it is one’s ability of understanding truth that determines one’s level of attainment.

Furthermore, by classifying various levels of understanding truth into coarse or subtle, Chih-i tells us that although truth is always the same, living beings do have different faculties, and as a result, their achievements are also different. Hence, the coarseness or the subtlety does not concern truth itself but is the consequence of various abilities of beings. However, if one strives to attain Buddhahood, the understanding of truth that belongs to the Perfect Teaching is superior to others. With such an understanding, one is able to realize truth perfectly.

By opening the coarse and displaying the subtle, Chih-i goes a step further to remind us that one should not dwell on differences, for all levels of understanding of truth are valid as all beings can eventually attain Buddhahood. This is to emphasize the message of universal salvation of all living beings delivered in the Lotus Sūtra. (Vol. 2, Page 118)