In antiquity the sage kings recognized that mens nature is bad and that their tendencies were not being corrected and their lawlessness controlled. – Xun Zi
If knowledge and foresight are too penetrating and deep, unify them with ease and sincerity. – Xun Zi
Human nature refers to what is in people but which they cannot study or work at achieving. – Xun Zi
Human nature is such that people are born with a love of profit If they follow these inclinations, they will struggle and snatch from each other, and inclinations to defer or yield will die. – Xun Zi