Nichiren’s teaching of exclusive commitment to the Lotus Sūtra in the Final Dharma age undergoes development from two perspectives. While it would be misleading to suggest that these exist as distinct categories in his thought, they may perhaps be thought of as two interconnected soteric modalities. The first is Nichiren’s emphasis on the importance of readiness to give one’s life for the Lotus Sūtra. Since, in Nichiren’s thought, only the Lotus leads to salvation, its devotees, out of compassion, must confront nonbelievers in the sūtra and strictly point out their errors. By enduring the abuse such efforts are likely to call forth, one’s past evil karma can be lessened or eradicated. To incur persecution for the Lotus Sūtra’s sake demonstrates the authenticity of one’s faith; to give one’s life for it is to guarantee one’s future Buddhahood. Nichiren developed this soteriology through his own reading of the Lotus and other sūtras and commentaries over the course of two exiles, various attempts on his life, and other ordeals he and his followers confronted in the course of his turbulent career.

Second, Nichiren taught that in the Final Dharma age, by arousing the mind of faith in the sūtra and chanting its title or daimoku in the phrase “Namu-Myōhō-Renge-Kyō,” one can realize Buddhahood with this very body. In this act, the identity of the Buddha and the ordinary worldling is manifested, and the place of practice becomes the Buddha land. This modality has obvious continuities with the esoteric Tendai tradition from which Nichiren had emerged.

Of these two soteric modalities, the first—attaining Buddhahood by meeting persecution for the sūtra’s sake—stands out more prominently in the body of Nichiren’s writings. It is the “outward face,” so to speak, of his religion and represents his response to immediate circumstances as he and his followers began to meet opposition from the bakufu and to wrestle with the doubts such persecution engendered. After Nichiren’s death, the ethos of “not begrudging bodily life” for the practice and propagation of the Lotus Sūtra proved instrumental in enabling his fledgling community to emerge as an independent sect and to define and maintain its identity vis-ā-vis older and more established institutions. It is in many ways definitive of his tradition, and no comprehensive account of his thought could ignore it. Informing it, however, is the second or “inner” soteric modality, that of realizing Buddhahood in the moment of chanting the daimoku. This is what ties Nichiren to the nonlinear model of salvation that characterizes much of medieval Japanese Buddhism. (Page 241-242)