Saichō argued that Hinayāna and Hossō practices all required eons, but that the Japanese could not actually follow them because they were not suited to their faculties. In contrast, the Lotus Sūtra taught a direct path; instead of walking (hogyō) upon the path, the practitioner flew (higyō) directly to his goal. The path requiring eons was descriptive of Mahāyāna doctrines and practices ranging from those of the Sanron and Hossō Schools to those of the Kegon School. In the Hokke shūku, Saichō characterized the differences between Kegon and Tendai One-vehicle teachings in terms of their efficacy in leading to enlightenment. Kegon practice was described as leading to sudden enlightenment only after eons of training (ryakukō shugyō tongo). Kegon doctrines had not yet fully revealed the ultimate teaching of the Buddha, nor had they been purged of provisional teachings. The teachings of the Lotus Sūtra, however, led directly to sudden enlightenment (jikishi dōjō tongo). An adherent of the Lotus Sūtra had no need for eons of preparatory practice and provisional teachings.