[T]he Lotus Sūtra is likened to the sun. The moon appearing at night with twinkling stars cannot put out the starlight although the moonlight is stronger. During the day, on the contrary, sunlight extinguishes not only starlight but also moonlight. Likewise, pre-Lotus sūtras are like the stars and the theoretical section of the Lotus Sūtra is like the moon whereas the “Life Span of the Buddha” chapter of the Lotus Sūtra is like the sun. Seen from the standpoint of the “Life Span of the Buddha” chapter, even the theoretical section is like the moon, which is not comparable to the sun, not to speak of other sūtras. People cannot work at night with either starlight or moonlight. When day breaks and the sun rises, people begin to work. Likewise, in the pre-Lotus sūtras and in the theoretical section of the Lotus Sūtra, as at night, nobody can cut the chain of life and death to attain enlightenment no matter how hard one tries. On the contrary, in the “Life Span of the Buddha” chapter in the essential section of the Lotus Sūtra, like the sun rising at daybreak, everyone necessarily gets rid of the chain of life and death to attain enlightenment.

Yakuō-bon Tokui-shō, The Essence of the ‘Medicine King Bodhisattva’ Chapter, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 32

Using the comparative luminosity of the stars and the moon and the sun works very well in this modern age to show the relationship between the “Life Span of the Buddha” chapter (the heart of the essential section) and both the theoretical section of the Lotus Sūtra and the pre-Lotus sūtras. But not all of Nichiren’s imagery and Japanese folk wisdom travels well from the 13 Century to the 21st.

In the letter Hokke Daimoku Shō, Treatise on the Daimoku of the Lotus Sūtra, Nichiren poses a question very much like what I’ve asked here and here:

QUESTION: You cannot burn anything by simply uttering the word, “fire” repeatedly. Indeed you have to use your hand in order to burn something. You cannot quench your thirst by just saying “water.” You need to use your mouth for drinking water. The same is true with the daimoku. I doubt it is possible to escape from the evil realms through the mere chanting of the daimoku, Namu Myōhō Renge Kyō. Isn’t it necessary to understand what the daimoku means and what it entails?

(Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 36)

I actually do believe that “it is possible to escape from the evil realms through the mere chanting of the daimoku,” but Nichiren’s response simply doesn’t age well:

ANSWER: When the sinew of a lion is used as a string for a koto, the sound is so powerful that all the strings made from other threads will snap. And when hearing of the sourness of a pickled plum, saliva fills the mouth without eating it. Such mysterious things happen even in worldly affairs. How then can it be denied that something wonderful happens with the Lotus Sūtra? Even a parrot is said to have been reborn in the realm of heavenly beings just by repeating the name of the Four Noble Truths of the Hinayana teaching. Moreover, a man who dedicated himself to the Three Treasures—the Buddha, Dharma, and Saṃgha—was able to escape the attack of a monster fish in the ocean. Imagine the wonders that would occur with the daimoku of the Lotus Sūtra, the essence of all the 80,000 teachings, and the eye of all the Buddhas. Do you still hold the belief that you cannot escape the four kinds of evil realms by just chanting the daimoku of the Lotus Sūtra?

Later in the same letter (Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 37-38), Nichiren writes:

When one enters the water carrying a rhinoceros horn, the water will be kept away by 5 feet. When a leaf of sandalwood opens, the bad odor of eraṇḍa will disappear as far as 40 yojana (distance covered by a traveling man in 40 days). The evil karma of ordinary people is like the water and the eraṇḍa and the daimoku of the Lotus Sūtra is like the rhinoceros horn and leaf of sandalwood. A diamond is so hard that nothing can break it except the horn of a sheep and the shell of a tortoise. Large birds cannot snap the branch of a large tree called nyagrodha though the wren, a small bird said to nest on the eyelashes of mosquitoes, can. The evil karma of ordinary people like us, is as hard as a diamond and as big as nyagrodha. The daimoku of the Lotus Sūtra, on the contrary, can easily break and snap the karma of ordinary people, like the horn of a sheep and the beak of a wren. As an amber jewel removes dust and a magnet attracts iron, so are our dust and iron of evil karma removed by amber and the magnet of the daimoku. You should always think this way and continuously chant Namu Myōhō Renge Kyō.

Using horns of endangered animals in order to wade through water is too far removed from modern sensibilities, but the amber jewel and magnet imagery fit nicely in my understanding of why I chant Namu Myōhō Renge Kyō

100 Days of Study