No matter what kind of prayer is performed, so long as the people in Japan do not listen to me, Japan will inevitably suffer as much misery as Iki and Tsushima today. My disciples, you should believe in this and see when it happens. This is not because I, Nichiren, am honorable, but because the power of the Lotus Sūtra is superior. If I walk with pride, I would be considered arrogant. If I humble myself, I would be considered despising the Lotus Sūtra. The higher a pine tree grows, the longer a hanging wisteria grows. The deeper the source of a river is, the longer the river flows. How wonderful it is that only I receive the true joy and pleasure in this defiled country!

Shōnin Chi-sanze-ji, The Sage Knows the Three Periods, Writings of Nichiren Shōnin, Biography and Disciples,
Volume 5, Pages 20-21

QUESTION: What should a believer of the Lotus Sūtra regard as the Honzon (the Most Venerable One)? How should one perform the Buddhist rites and practice daily training?

ANSWER: First of all, the Honzon could be eight fascicles, one fascicle, one chapter or the title alone of the Lotus Sūtra. This is preached in the “Teacher of the Dharma” and “Divine Powers of the Buddhas” chapters. Those who can afford to may have the portraits or wooden statues of Śākyamuni Buddha and the Buddha of Many Treasures made and placed on both sides of the Lotus Sutra. Those who can further afford to may make the portraits or wooden statues of various Buddhas all over the universe or Universal Sage Bodhisattva. As for the manner of performing the rites, standing or sitting practices must be observed in front of the Honzon. Outside the hall of practice, however, one is free to choose any of the four modes of acts: walking, standing, sitting and lying down. Next, regarding the daily practices, the daimoku of the Lotus Sūtra should be chanted, “Namu Myōhō Renge Kyō.” If possible, a verse or phrase of the Lotus Sūtra should respectfully be read. As an auxiliary practice one may say a prayer to Śākyamuni Buddha, the Buddha of Many Treasures, the numerous Buddhas throughout the universe, various bodhisattvas, Two Vehicles, Heavenly Kings, dragon gods, the eight kinds of gods and demi-gods who protect Buddhism as one wishes. Since we have many ignorant people today, the “3,000 existences contained in one thought” doctrine may be difficult to contemplate from the beginning. Nevertheless, those who wish to study it are encouraged to do so from the start.

Shō Hokke Daimoku-shō, Treatise on Chanting the Daimoku of the Lotus Sūtra, Writings of Nichiren Shōnin,
Faith and Practice, Volume 4, Page 20

Question: Various sūtras other than the Lotus Sūtra adapt their doctrines and merits to the caliber of particular types of beings such as bodhisattvas, gods, and śrāvaka or pratyekabuddha. For whom is the Lotus Sūtra preached?

Answer: The Lotus Sūtra is difficult to understand for anyone except those to whom the dharma is transmitted. This Lotus Sūtra was expounded for all living beings in the Ten Realms including both wicked and virtuous men, the wise and the unwise, those who keep precepts and those who do not, male and female, four kinds of Buddhist devotees (monks, nuns, laymen and laywomen), and the eight kinds of supernatural beings (gods, dragons, yakṣa: devils, gandharava: heavenly musicians, asura, garuda: golden-winged bird, kimnara: heavenly musician, and mahoraga: boas).

The so-called wicked people refer to such people as Devadatta, Wonderful Adornment King and Ajātaśatru King; virtuous people refer to such gods and men as Queen Vaidehi. A wise man is Śāriputra while an unwise man is Cūdapanthaka. Those who keep the precepts refer to śrāvaka and bodhisattvas while those who do not are dragons and other animals. The female means a dragon girl. In general, living beings of the Ten Realms all perceive the teaching of the One Buddha Vehicle expounded in the Perfect teaching of the Lotus Sūtra. Scholars who do not understand this say, “The Lotus Sūtra is not the teaching for us ordinary people.” This is indeed awful and against the true intent of the Buddha.

Ichidai Shōgyō Tai-I, Outline of All the Holy Teachings of the Buddha, Writings of Nichiren Shōnin,
Doctrine 3, Page 75-76

Śākyamuni Buddha is the supreme leader and excellent eyes for all the people. He is the bridge that enables them to cross the river of evil passions; He is the skipper who guides them over the sea of life and death; and He is the fertile field in which they plant the seed of merits. The so-called Four Sages of Confucianism and Three Hermits of Brahmanism, despite their worthy names, are actually unenlightened ordinary men unable to rid themselves of the Three Delusions (all delusions and evil passions). Although their names suggest that they are wise men, in reality they are as ignorant as infants, who know nothing of the principle of cause and effect. How can we cross the sea of life and death aboard a ship steered by such men? How can we pass through the winding street in the Six Realms over to the world of Nirvana by means of a bridge constructed by such men? Our Śākyamuni has already crossed the sea of life and death for arhats, not to speak of that for the unenlightened. He has already extinguished fundamental ignorance, not to speak of delusions in view and thought arising from it.

Kaimoku-shō, Open Your Eyes to the Lotus Teaching, Writings of Nichiren Shōnin, Doctrine 2, Page 32

According to the scriptural statement and its interpretations by T’ien-t’ai and Miao-lê, the merit of upholding or protecting even one verse of the Lotus Sūtra is superior to that of giving offerings to all living beings, arhats, or all Buddhas with the seven treasures that spill over all the worlds in the universe. The “Medicine King Bodhisattva” chapter states, “The merit of upholding a stanza or a verse of the Lotus Sūtra is the greatest, to which none can compare.” T’ien-t’ai declares, “A man is light while the Dharma is heavy,” and Miao-lê, “The four stages of birth, rearing, growth and prosperity are different from one another, but they are all based on the Dharma.” Comparing all the living beings in the nine realms against Buddhas (in the realm of Buddhas), the merit of all the living beings is as light as a strand of hair while that of Buddhas is as heavy as a great mountain. Comparing Buddhas against the Lotus Sūtra, on the other hand, the merit of Buddhas is as light as the Brahma King’s robe while one character of the Lotus Sūtra is as heavy as the great earth. When T’ien-t’ai said that a man was light and the Dharma was heavy, he called a Buddha a man and the Lotus Sūtra the Dharma. The sūtras preached before the Lotus Sūtra and commentaries on them all praise the merit of Buddhas. These writings are like Buddhas. The Lotus Sūtra, on the contrary, extols the merit of the sūtra; it is like the parents of the Buddha, the parents who gave birth to those Buddhas.

Hōkyō Hōjū Ji, The Dharma Is More Precious Than Treasures, Wooden Statues or Portraits, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 100

As no Mahāyāna sūtras except one  preach on the basis of the doctrine of “revealing the truth and merging all the provisional,” neither the doctrine of obtaining Buddhahood for the Two Vehicles nor that of attainment of Buddhahood by Śākyamuni Buddha in the eternal past is preached in them. The Lotus Sūtra on the other hand, is expounded on the basis of the “revealing the truth and merging all the provisional” doctrine, thus both doctrines of attaining Buddhahood by the Two Vehicles and the attainment of Buddhahood by Śākyamuni Buddha in the eternal past are revealed in it. Accordingly, it would be the sin of slandering the dharma for followers of those Mahāyāna sūtras to criticize the Lotus Sūtra, but criticism of those Mahāyāna sūtras by believers of the Lotus Sūtra does not constitute slander of the dharma.

Ken Hōbō-shō, A Clarification of Slandering the True Dharma, Writings of Nichiren Shōnin, Doctrine 3, Pages 122-123 

[T]he most important thing for non-Buddhist teachings is, like Confucianism, to prepare the way to Buddhism. This is why some non-Buddhists maintain that the Buddha will be born 1,000 years later, while others insist on 100 years later. It is said, therefore, in the Nirvana Sūtra that what is written in all the non-Buddhist scriptures is nothing but the teaching of the Buddha. Again, it is said in the Lotus Sūtra, chapter eight, “Assurance of Future Buddhahood,” that disciples of the Buddha sometimes pretend to be contaminated with the Three Poisons of greed, anger, and ignorance or show the heretic view denying the law of cause and effect as an expedient means to save the people.

Kaimoku-shō, Open Your Eyes to the Lotus Teaching, Writings of Nichiren Shōnin, Doctrine 2, Page 32

[W]e know that being aware of the past and future precisely is the qualification to be a sage. Without doubt, Śākyamuni Buddha knew that he would pass away in three months in the near future, and he also foretold that the Lotus Sūtra would spread widely in the Latter Age of Degeneration in the far future. Therefore, He could predict things in the far future with His ability of predicting things in the near future or foretell the future state with the knowledge of the present state. This is what the “Expedients” chapter of the Lotus Sūtra expounds, “The truth of all things consists of their appearances, natures … and their consistency from beginning to end.” Who then should be considered as a practicer of the Lotus Sūtra in the last 500-year period? I do not consider myself to be a man of wisdom. However, I can trust my wisdom concerning my predictions of domestic disturbance and foreign invasion. This is not to be bragged about to others. I hope that my disciples understand this. I, Nichiren, am the practicer of the Lotus Sūtra in the Latter Age of Degeneration. Since I follow the footsteps of Bodhisattva Never-Despising, anyone who despises or slanders me, will have his head broken into seven pieces. Whoever believes me, however, will accumulate merit as high as Mount Sumeru.

Shōnin Chi-sanze-ji, The Sage Knows the Three Periods, Writings of Nichiren Shōnin, Biography and Disciples, Volume 5, Pages 20

Just as drops of water fall to become rivers flowing into an ocean and dust particles accumulating to form Mt. Sumeru, the contention of the one person attached to a provisional sūtra will gradually increase, the number of people who do not believe in the true teaching will increase, and even the believers of the true teaching will fall back to believing in the provisional teaching. When believers of the provisional sūtras thus fill the country, the heart of rejoicing at hearing the Lotus Sūtra will be lost and it will be like a country without a king or a human being without spirit. The Lotus-Shingon temples will all fall into disrepair, divine protection by heavenly kings, virtuous gods, dragon god and others will disappear, and sages will all abandon the country. Taking advantage of the situation, devils and demons will take hold of the country, where evil winds will stop staple grains from ripening, and epidemics will spread to lead the people to ruin.

Shō Hokke Daimoku-shō, Treastise on Chanting the Daimoku of the Lotus Sūtra, Writings of Nichiren Shōnin, Faith and Practice, Volume 4, Page 17

The Lotus Sūtra of the fifth period consists of one fascicle of the Sūtra of Infinite Meaning as an introduction, eight fascicles of the Lotus Sūtra, and one fascicle of the Sūtra of Meditation on the Universal Sage Bodhisattva as the conclusion, bringing the total number of fascicles to ten.

The reason for my commentaries on the Four Teachings (Tripiṭaka, Common, Distinct, and Perfect) and the Four Periods (Flower Garland, Agama, Expanded, and Wisdom) is to help others learn what the Lotus Sūtra is. For one cannot correctly understand the teaching of the Lotus Sūtra without learning the pre-Lotus Sūtras, although one may study the pre-Lotus Sūtras without learning about other Sūtras.

In support of this, Grand Master T’ien-t’ai stated in his Profound Meaning of the Lotus Sūtra, “When attempting to spread various sūtras other than the Lotus Sūtra, the essential part of the teaching will not be lost even if a doctrinal analysis of all the teachings of the Buddha is not rendered. When attempting to spread the Lotus Sūtra, however, the essence of the teaching may be lost if a doctrinal analysis is not made.” It is preached in the Lotus Sūtra (chapter 2, “Expedients”), “Although the Buddhas expound various teachings, it is for the purpose of leading the people into the world of the One Buddha Vehicle.” “Various teachings” here refer to all the pre-Lotus Sūtras. “For the purpose of leading the people into the world of the One Buddha Vehicle” means to expound all the scriptures of Buddhism to reveal the Lotus Sūtra.

Ichidai Shōgyō Tai-I, Outline of All the Holy Teachings of the Buddha, Writings of Nichiren Shōnin, Doctrine 3, Page 75