Buddhist Thought #40, Enlightenment.

 This teaching was not propagated in the Former or Middle Day of the Law because the other sutras had not yet lost their power of benefit. Now, in the Latter Day of the Law, neither the Lotus Sutra nor the other sutras lead to enlightenment. Only Nam-myoho-renge-kyo can do so. This is not my own judgment. shakyamuni, Many Treasures, the buddhas of the ten directions, and the bodhisattvas who emerged from the earth as nuerous as the dust particles of the thousand worlds have so determined it. (WND, 903)