During the bleak Sado Island years, Nichiren grappled with the question of why, when the Lotus Sūtra promises “peace in this world,” he should have to undergo such ordeals. He also pondered other doubts, sometimes voiced by his followers: If he was indeed correctly practicing the Lotus Sūtra, why didn’t the benevolent deities who protect the buddha-dharma intervene to assist him? Why didn’t those who persecuted him meet with obvious karmic retribution?

Nichiren addressed these questions in a deeply introspective mode, for example, in his famous treatise Kaimoku shō (“Opening the Eyes,” 1272), one of his most important writings, written as a testament to his followers in the event of his death. Here he reflects that in prior lifetimes, he himself must have committed offenses against the Lotus Sūtra and its devotees and was now enduring his present trials to expiate such offenses, just as iron is cleansed of impurities when forged in a fire. In this context, Nichiren drew upon the six-fascicle Mahāparinirvāṇa Sūtra, which states: “By the power of the merit gained by protecting the dharma, one receives lightened [karmic retribution for past offenses] in the present life.” In adopting this perspective, Nichiren claimed agency for his sufferings by representing them, not as a trial inflicted upon him by his enemies, but as an ordeal that he had deliberately chosen as an act of expiation. He also encouraged his followers by saying that the hardships they faced had in fact been predicted in the Lotus Sūtra itself, and thus confirmed the legitimacy of their practice and the certainty of their eventual buddhahood.

As for why their tormentors failed to experience obvious karmic retribution, Nichiren simply noted that when a person’s sins are so weighty as to condemn them after death to the Avici hell, there may be no sign of retribution in that individual’s present life. Alternatively, Nichiren maintained that because people had abandoned the Lotus Sūtra, the protective deities, no longer able to hear the true dharma, had abandoned their shrines and returned to the heavens; thus, they could not be counted on to safeguard Lotus devotees or to punish their persecutors. Yet his conclusion was a resolve that seeks no explanation for adversity and no guarantee of protection; it is a resolve to simply persevere, whatever may happen: “Let heaven forsake me. Let ordeals confront me. I will not begrudge bodily life. … Whatever trials I and my disciples may encounter, so long as we do not cherish doubts, we will naturally achieve buddhahood. Do not doubt because heaven does not extend its protection. Do not lament that you do not enjoy peace in this world.”

Nichiren’s conviction infused his life with immense meaning and enabled him to assert — in the midst of privation and danger — that he was “the richest man in all Japan today.” Nichiren taught his followers that while faith might result in this-worldly good fortune, more importantly, it revealed inner resources of joy and assurance, independent of outward circumstances, that would sustain them through trying times.