[Nichiren’s] earliest surviving essay, written when he was twenty-one, suggests that he already took the Lotus Sūtra to be the sole teaching of universal buddhahood; his subsequent studies enhanced and deepened this conviction. Throughout, he was guided by the words of the Nirvāṇa Sūtra — regarded in Tendai circles as a restatement of the Lotus — to “rely on the dharma and not on the person.” For Nichiren, this meant that one should rely on the sūtras rather than the works of later commentators or the opinions of contemporary teachers, however eminent. And among the sūtras, one should rely above all on the Lotus, which is complete and final, and not others, which are incomplete and provisional. It is essential to bear in mind that for Nichiren, as for many of his contemporaries, the sūtras were literally the Buddha’s words; the stages of his fifty-year teaching career as mapped out in the Tendai doctrinal classification system represented historical truth; and the ranking of particular scriptures in the Tendai hierarchy of teachings directly mirrored their degree of salvific power.