《淮南子·原道训》
在于他们内心已领悟天机，因而不因贵贱、贫富、劳逸的不同而丧失天性。
则内有以通于天机，而不以贵贱贫富劳逸失其志德者也。
It is because they understand the secrets of heaven in their hearts and therefore do not lose their innate nature because of differences in nobility, poverty, work and leisure.