Grand Master Miao-lê in his Annotations to the Words and Phrases of the Lotus Sūtra asserts, “Most people make mistakes, without knowing how great the merits of the inexperienced practicers can be. They imagine that only the experienced practicers can have merits and slander the inexperienced. Therefore, in the ‘Merits of Rejoicing at Hearing This Sūtra’ chapter it is shown that the merits of the inexperienced practicer can be great and how great the merits of the Lotus Sūtra are.” This passage means that the merit of the 50th person rejoicing at hearing the Lotus Sūtra transmitted one after another was preached to show that the merit of an ignorant person with little capacity in the Latter Age rejoicing even for a moment at hearing the sūtra preached is superior to the merit of sages who practice the pre-Lotus sūtras preached during the 40 or so years before the Lotus Sūtra. This is preached so that the Lotus Sūtra is not mistaken as the teaching attained by only persons of superior capacity and devotion.
Therefore, Grand Master T’ien-t’ai in his Words and Phrases of the Lotus Sūtra compares the 50th person rejoicing at hearing the Lotus Sūtra transmitted one after another, the lowest rank in the practice of the Lotus Sūtra, against the practicers of non-Buddhist teachings, Hinayana Buddhism, and provisional Mahayana Buddhism. He states that the merits of the lowest rank in the practice of the Lotus Sūtra are superior to those of any other practice.
Shō Hokke Daimoku-shō, Treastise on Chanting the Daimoku of the Lotus Sūtra, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 7-8