Chih-i points out that although various sūtras entail the same subtle teaching like that of the Lotus Sūtra, they also contain coarse explanations, which cannot be integrated with the subtlety. Therefore, these sūtras are coarse. The uniqueness of the Lotus Sūtra is revealed in two perspectives. First, it entails only one perfect explanation, i.e., reality is an integrated unity, since it is upright without any expedient means, and only presents the unsurpassed Path of Buddhahood. Second, the coarseness is integrated with the subtlety, and therefore, the coarseness is subtle as well. (Vol. 2, Page 287)