It is stated in the Words and Phrases of the Lotus Sūtra, fascicle 9, “The seed of Buddhahood was planted by this Buddha-Bodhisattva at the beginning, and it was nurtured by this Buddha-Bodhisattva;” and in the Profound Meaning of the Lotus Sūtra, fascicle 6, “The Buddha appears in the actual world with form and figure to guide the people. How can those in whom He had planted the seed of Buddhahood not come to receive His guidance? As streams of many rivers all go into the ocean, people who have established a relationship with the Buddha can have the good fortune of encountering the Buddha in this life.”

As stated above, the Profound Meaning of the Lotus Sūtra, fascicle 6, preaches, “Properly speaking, all living beings will awaken aspiration for Buddhahood and proceed to it without falling back to a lower spiritual stage by following this Buddha.”

Ichidai Goji Keizu, Genealogical Chart of the Buddha’s Lifetime Teachings in Five Periods, Writings of Nichiren Shōnin, Doctrine 3, Page 248-249

According to the shakumon section of the Lotus Sūtra, the people in this Sahā World have been closely related to Śākyamuni Buddha since dust-particle kalpa ago without any relations to other Buddhas such as the Buddha of Infinite Life. Chapter 7 on the “Parable of A Magic City,” of the Lotus Sūtra states: “Those who listened to the teachers then have always been beside those Buddhas. … Destiny has made them meet the preaching of the Lotus Sūtra now.” This statement tells us that we, the people in this Sahā World, have never been in Pure Lands of fifteen other Buddhas such as the Buddha of Infinite Life in the universe. Grand Master T’ien-t’ai states in his Words and Phrases of the Lotus Sūtra:

“An old interpretation considers the Buddha of Infinite Life as the rich father in the parable of the father and son. However, this is incorrect, and today we do not consider the Buddha of Infinite Life as the wealthy father. The Western Pure Land of the Buddha of Infinite Life and this Sahā World of Śākyamuni Buddha each has a different Buddha and karmic relations. The Buddha of Infinite Life is not the Lord Buddha of this Sahā World, so he was never born to and died in this world. He never guided us in this world. There are no relationships formed between the Buddha of Infinite Life and us like that of a father and son. There are no words in the Lotus Sūtra which state that the Buddha of Infinite Life is our lord, teacher or parent. If you really want to encounter the Buddha, you need to contemplate this with your eyes closed.”

Grand Master Miao-lê explains this in his Annotations on the Words and Phrases of the Lotus Sūtra: “Śākyamuni Buddha and the Buddha of Infinite Life have completely different karmic relationships to the people in their past lives, and the worlds they guided are completely different. By birth and in growing up, the Buddha of Infinite Life and the people in this Sahā World have no father-son relationship.” From these statements of T’ien-t’ai and Miao-lê, I would think the Buddha of Infinite Life and other Buddhas in the world all over the universe are like stepfathers whereas Śākyamuni Buddha is a compassionate, real father. T’ien-t’ai wrote many works interpreting the Lotus Sūtra; however, we should know this interpretation of his to be fundamental, and consider Śākyamuni Buddha as the lord of this Sahā World.

Gochū Shujō Gosho, People in the World Letter, Writings of Nichiren Shōnin, Doctrine 2, Page 202

On the palm of a man named Mahānāma a pebble changed to a precious stone. King Konzoku is said to have been able to transform sand into gold. The Lotus Sūtra enables even insentient beings such as grass and trees to attain Buddhahood, not to speak of sentient beings that possess minds such as humans. The Lotus Sūtra enables the Two Vehicles whose seed of Buddhahood has been burned to attain Buddhahood, how much more so with people whose seed of Buddhahood is still alive! Moreover, the Lotus Sūtra enables even the icchantika who has no religious belief to attain Buddhahood, how much more it will lead those with religious faith.

Ueno-dono Gohenji, Reply to Lord Ueno, Writings of Nichiren Shōnin, Volume 7, Followers II, Page 33

As we cannot see this with our own eyes, we may wonder whether or not there are sūtras superior to the Lotus Sūtra in India, the Dragon Palace, palaces of the Four Heavenly Kings, and the palaces of the sun and moon gods. Were not the King of the Brahma Heaven, Indra, the gods of the sun and moon, the Four Heavenly Kings and the Dragon King present at the assembly of the Lotus Sūtra? If heavenly gods who were present at the assembly like those of the sun and moon say, “You may not know this but there is a sūtra superior to the Lotus Sūtra,” they are absolute liars. I, Nichiren, would charge them declaring:

It is due to their merits in keeping the precept of not telling a lie that the sun and moon stay high up in the sky as securely as we human beings stand on the earth. If they should utter such a lie as there are sūtras superior to the Lotus Sūtra, they would fall before the Kalpa of Destruction and this world would come to ruin. They would not stop falling until they hit the bottom of the Hell of Incessant Suffering. Such inadmissibly deceiving beings could not possibly remain in the sky even for a while orbiting the four continents which surround Mt. Sumeru.

Hōon-jō, Essay on Gratitude, Writings of Nichiren Shōnin, Doctrine 3, Pages 6-7.

[W]ithout the power of the Lotus Sūtra, it is impossible for any living being to attain Buddhahood, break through the six lower realms and be reborn in any of the Pure Lands of Buddhas throughout the universe. It is the same as a Japanese person who wishes to enter the Chinese Imperial Palace must first receive permission from the Japanese sovereign. You must rely on the power of the Lotus Sūtra in order to leave this Sahā World to enter a Pure Land. For example, if a woman, whether she be an ordinary woman or a daughter of the Imperial Regent, bears a king’s child, that child will someday become a king. On the other hand, if a daughter of a king bears a vassal’s child, that child can never become a king. Accordingly, all living beings including bodhisattvas, men of the Two Vehicles, human beings, heavenly beings and animals who will be reborn in Pure Lands throughout the universe do so as royal children of the Lotus Sūtra. It is because children of the Lotus Sūtra are all able to become Buddhas.

Shōjō Daijō Fumbetsu-shō, The Differences between Hinayāna and Mahāyāna Teachings, Writings of Nichiren Shōnin, Doctrine 2, Page 197

It is predicted in the Lotus Sūtra: “Many people hate this sūtra with jealousy even in My lifetime. Needless to say, more people will hate this sūtra after My death.” The difficulties the Buddha encountered were incalculable. Above all He was forced to feed himself with fodder for 90 days; a huge rock was dropped on Him; His toes were injured and bled; eight disciples of the Buddha such as Sunakṣatra sided with non-Buddhists and tried to attack Him while off guard day and night; King Virūḍhaka murdered countless members of the Śākya clan; and King Ajātaśatru killed countless disciples of the Buddha by making drunken elephants tread on them. However, these were minor difficulties during the lifetime of the Buddha when compared to what is to come. Major difficulties that was predicted by the Buddha to occur after “His extinction” have not been experienced by either Nāgārjuna, Vasubandhu, T’ien-t’ai, or Dengyō. If someone says that they were not the practicers of the Lotus Sūtra, for what reasons are they not? On the contrary, if we say that they were the practicers, why have they not shed blood like the Buddha? Much more than that, they have never encountered greater difficulties than those of the Buddha. How can we call them the practicers of the Lotus Sūtra? Otherwise, the scriptural statement “More people will hate this sūtra after My death” would be futile, and the teachings of the Buddha would be a big lie.

However, during my propagation of the teaching of the Lotus Sūtra in the past 27 years, I, Nichiren, encountered many persecutions. I was exiled to the Province of Izu on the twelfth day of the fifth month in the first year of Kōchō (1261), injured on the forehead and my left hand was broken on the eleventh day of the eleventh month in the first year of Bun’ei (1264), placed on the execution mat on the twelfth day of the ninth month in the eighth year of Bun’ei (1271), and exiled to Sado Province in the end. Moreover, numerous disciples of mine were killed, wounded, expelled, or fined. I do not know whether or not my difficulties may equal or surpass those of the Buddha, but those of Nāgārjuna, Vasubandhu, T’ient’ai, and Dengyō cannot compare to mine, Therefore, if I had not appeared in the Latter Age of Degeneration [as a practicer of the Lotus Sūtra], the Buddha would have been a big liar, and the Buddha of Many Treasures and the Buddhas in manifestation from all the worlds in the universe would testify to this great falsehood. In the 2,220 years or so since the passing of the Buddha, I, Nichiren, am the only one who has verified the Buddha’s Words in the whole world.

Shōnin Gonan Ji, Persecution Befalling Nichiren Shōnin, Writings of Nichiren Shōnin, Volume 5, Page 118

Rivers come together to form an ocean. Particles of dust accumulate to become Mt. Sumeru. When I, Nichiren, began having faith in the Lotus Sūtra, it was like a drop of water or a particle of dust in Japan. However, when the sūtra is chanted and transmitted to two, three, ten, a million, and a billion people, it will grow to be a Mt. Sumeru of perfect enlightenment or the great ocean of Nirvana. There is no way other than this to reach Buddhahood.

Senji-shō, Selecting the Right time: A Tract by Nichiren, the Buddha’s Disciple, Writings of Nichiren Shōnin, Doctrine 1, Page 243-244

Suppose there is a common or a noble woman who conceived a child by the king, people who do not know who is the real father of the child may consider the child to be a son of a commoner or a nobleman. They will all realize, however, that the baby is a child of the king when the king himself declares the truth. By the same token, when the Lotus Sūtra informs you of those who are able to leave the triple world of birth and death or escape the cycle of the six realms and ascend the four realms through the pre-Lotus sūtras, it is all because the seeds of the Lotus Sūtra have been implanted within their lives throughout previous existences. Of the people who had planted the seed during their previous lives, those who are unresponsive and not able to attain nirvana through the pre-Lotus sūtras are able to attain enlightenment through the Lotus Sūtra during this lifetime. It is like a crown prince who was given birth by the queen but was raised by a wet nurse. The nurse is equivalent to the sūtras prior to the Lotus Sūtra.

Shōjō Daijō Fumbetsu-shō, The Differences between Hinayāna and Mahāyāna Teachings, Writings of Nichiren Shōnin, Doctrine 2, Page 197