Sincerity means the completion of the self, and the Way is self-directing. Sincerity is the beginning and end of things. Without sincerity there would be nothing. Therefore the superior man values sincerity. Sincerity is not only the completion of one's own self, it is that by which all things are completed. The completion of the self means humanity. The completion of all things means wisdom. These are the character of the nature, and they are the Way in which the internal and the external are united. Therefore whenever it is employed, everything done is right.

(The Zhongyong)