The third chapter of the Lotus Sūtra, called “A Parable,” states that this triple world is the Buddha’s world and all the people living in it are His children. We, ignorant people, full of evil passions, can be as meritorious as Śākyamuni Buddha because He bestows upon us all His merit. The Sūtra’s second chapter, called “Expedients” affirms also that we are equivalent to Śākyamuni Buddha. This proves that the believers of the Lotus Sūtra reach the same level as Śākyamuni Buddha. For instance, a child is born from the unity of his parents. Therefore, who could argue that the child’s body is not his parents’ body? A child of the king of oxen will become a king of oxen but not a king of lions. A child of the king of lions will become a king of lions but not a king of humans or heavenly beings.

Now, practicers of the Lotus Sūtra are Lord Śākyamuni’s children as he has said, “They are all my children.” It is therefore possible for them to become kings of the dharma just as Śākyamuni is king of the dharma. However, unfilial children cannot succeed their parents. The Crown Prince Tan-chu of King Yao and Prince Shang-chün of King Shun, who were unfilial, were disowned by their fathers and became commoners. On the other hand, Chung-hua and Yu were both children of commoners, but due to their filial piety, they were called respectively by King Yao and King Shun to succeed them on the throne. Thus, commoners instantly rose to the level of kings. A commoner instantly rising to the level of kings is equivalent to an ignorant person suddenly attaining Buddhahood. This is the essential point of the “3,000 existences contained in one thought” doctrine.

Nichimyō Shōnin Gosho, A Letter to Nichimyō Shōnin, Writings of Nichiren Shōnin, Followers II, Volume 7, Page 139