Now just get a flavor of some of Zhu Zi's writing. Original mind is principle as derived from Tai Chi in itself, unmoved and perfectly good, while physical nature on the other hand is principle mixed with material force, qi. It is the aroused state involving both good and evil. The two natures, however, are always interfused, one the substance and the other function. So once again, even though he was Confucian, he was a Confucian philosopher, this is very Taoist in nature. And even this notion of talking about original mind is principle in itself, unmoved and perfectly good. This feels very Buddhist or even Hindu in its thinking.