This real intention of the Buddha is revealed by the means of opening the coarseness and the subtlety that is accomplished in the ultimate teaching of the Lotus Sūtra. Chih-i stresses that it is the Lotus Sūtra that brings the unification of the coarseness and the subtlety into completion. Chih-i emphasizes that not only all other teachings before the Lotus Sūtra were built up for the convenience of revealing the Ultimate Truth, but actually the first appearance of the Buddha from the incalculable past had already been determined for the revelation of the Lotus Sūtra. Why is the Lotus Sūtra so important? To Chih-i, it is because of the sudden revelation of the Ultimate Truth in the Lotus Sūtra that the Lotus Teaching enables all believers of both Śrāvakayāna and Mahāyāna to enter the terrace of the lotus blossom (a representation of subtle enlightenment) from their coarse stages (i.e., the stage at which they are unable to conceive the Ultimate Truth). With the teaching of the Lotus Sūtra, all disciples, whether they used to hearing one, two, three, or four flavors of the teaching, or even no teaching, are guaranteed to attain Buddhahood. This is the meaning of opening the coarse and revealing the subtle. (Vol. 2, Page 111)