When people lack teachers, their tendencies are not corrected; when they do not have ritual and moral principles, then their lawlessness is not controlled.
XunziIf the quickness of the mind and the fluency of the tongue are too punctilious and sharp, moderate them in your activity and rest.
XunziA person is born with feelings of envy and hate. If he gives way to them, they will lead him to violence and crime, and any sense of loyalty and good faith will be abandoned.
Xunzi