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。

孔子说：“外表威严而内心怯懦的人，用小人作比喻，就象挖墙洞的小偷吧！”

Mathematics is the music of reason.

The individual is the only reality. The further we move away from the individual toward abstract ideas about Homo sapiens, the more likely we are to fall into error.

"The only thing to do with good advice is to pass it on. It is never of any use to oneself."