邪恶获胜的唯一必要条件是好人无所作为。
The only thing necessary for the triumph of evil is for good men to do nothing.
The most perfect education, in my opinion, is such an exercise of the understanding as is best calculated to strengthen the body and form the heart.
Auction design is as much about psychology as it is about mathematics.
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。