 Intending to weigh up a situation carefully [in order to exercise expedient means], one must have cultivated the inner root daily, so that one’s mind is sensitive, perspicacious, pure, and integrated; [even in that case,] one still must naturally weigh up such situations most carefully. As Cheng Yi (1033–1107) said: Be reverent in order to straighten oneself within; practice appropriateness in order to square situations without. One’s sense of appropriateness comprises the moral fiber which one expresses through sincere ritual action (YL 37, 37:6a, par. 36).