The Collection Concerning the Immediate Attainment of Buddhahood [by Grand Master Jikaku] further states:

“First, speaking of the gist of the Lotus Sūtra, it is preached that various Buddhas have appeared in this world for the one important purpose and that all the people have the Buddha-nature. People will be able to attain Buddhahood if they hear and practice the teaching of the Lotus Sūtra. For what reason has the Buddha expounded the Three Inherent Potentials of the Buddha-nature (innate Buddha-nature, ‘wisdom’ to develop the innate Buddha-nature, and virtuous deeds which enable one to develop ‘wisdom’)? It is said in the first fascicle of the Dependent-Origination section of the Treatise on the Buddha-nature by Bodhisattva Vasubandhu that the Buddha insisted on the existence of the Buddha-nature in all the people for the purpose of helping them eliminate five kinds of mistakes and obtain five kinds of merit. The five kinds of mistakes are despicable mind, conceit, attachment to delusion, slandering the True Dharma and attachment to self-interest. On the other hand, the five kinds of merit are diligence, respect, wisdom, intelligence, and great compassion. It is ‘despicable’ to harbor doubts about the Buddha-nature in oneself and fail to aspire to Buddhahood; it is called ‘conceit’ to think that one has the Buddha-nature and can aspire to Buddhahood by oneself; it is the ‘attachment to delusion’ to believe that all things have substance though they actually exist only through conditions; it is ‘slandering the True Dharma’ to speak ill of the pure wisdom and virtue of all things; and it is called ‘attachment to self -interest’ to think only about oneself without compassion for all the people. We should eliminate these five kinds of mistakes, know the existence of the Buddha-nature in ourselves, and aspire to Buddhahood.”

Nizen Nijō Bosatsu Fu-sabutsu Ji, Never-Attaining Buddhahood by the Two Vehicles and Bodhisattvas in the Pre-Lotus Sūtras, Writings of Nichiren Shōnin, Doctrine 3, Page 223