Men of all social stations live together: they are equal in their desires, yet vary in their methods; they are equal in their passions, yet different in their intelligence; that is their nature-given vitality.
XunziThere are successful scholars, public-spirited scholars, upright scholars, cautious scholars, and those who are merely petty men.
XunziSince the nature of people is bad, to become corrected they must be taught by teachers and to be orderly they must acquire ritual and moral principles.
Xunzi