These people are exactly the same in their Buddha-nature, but a wide difference obtains among them in the extent of their expressing that nature in deeds. If thieves and murderers be called bad-natured, reformers and revolutionists should be called so. If, on the other hand, patriotism and loyalty be said to be good, treason and insurrection should likewise be so. Therefore it is evident that a so-called good person is none but one who acts to promote wider interests of life, and a so-called bad person is none but one who acts to advance narrower ones. In other words, the bad are the good in the egg, so to speak, and the good are the bad on the wing. As the bird in the egg is one and the same as the bird on the wing, so the good in the egg is entirely of the same nature as the bad on the wing. To show that human nature transcends the duality of good and evil, the author of Avatamsaka-sutra declares that 'all beings are endowed with the wisdom and virtue of Tathagata.' Kwei Fung (Kei-ho) also says: "All sentient beings have the Real Spirit of Original Enlightenment (within themselves). It is unchanging and pure. It is eternally bright and clear, and conscious. It is also named Buddha-nature, or Tathagata-garbha."
12. The Great Person and Small Person.--For these reasons Zen proposes to call man Buddha-natured or Good-natured in a sense transcendental to the duality of good and bad. It conveys no sense to call some individuals good in case there is no bad individual. For the sake of convenience, however, Zen calls man good, as is exemplified by Shakya Muni, who was wont to address his hearers as 'good men and women,' and by the Sixth Patriarch in China, who called everybody 'a good and wise one.' This does not imply in the least that all human beings are virtuous, sinless, and saintly-nay, the world is full of vices and crimes. It is an undeniable fact that life is the warfare of good against evil, and many a valiant hero has fallen in the foremost ranks. It is curious, however, to notice that the champions on the both sides are fighting for the same cause. There can be no single individual in the world who is fighting against his own cause or interest, and the only possible difference between one party and the other consists in the extent of interests which they fight for. So-called bad persons, who are properly designated as 'small persons' by Chinese and Japanese scholars, express their Buddha-nature to a small extent mostly within their own doors, while so-called good persons, or 'great persons' as the Oriental scholars call them, actualize their Buddha-nature to a large extent in the whole sphere of a country, or of the whole earth.