《晋书·志·第九章》
然而圣人传下的制度，不因为有变故异象就事先取消朝会的礼仪，这是因为有时灾异自行消失而不发生，有时推算会有错误。 
然则圣人垂制，不为变异豫废朝礼者，或灾消异伏，或推术谬误也。 
However, the system handed down by the sages did not cancel the etiquette of the court meeting in advance because of changes and anomalies, because sometimes the disasters disappeared by themselves and did not happen, and sometimes the calculations were wrong.