The only person you should try to be better than is the person you were yesterday.
解释:往往在你觉得是轻而易举的时候,困难也就跟着来了。
国君自以为神圣聪明,而不去咨询官吏,自以为国家安定强大,而不注重防守,周围的邻国图谋侵略他却不知道戒备。
Adaptation is the key to understanding both thought and behavior.