Mathematics is the foundation upon which all science is built.
君主所凭借着驱使臣下的,只有尚贤一种方法;臣下用来侍奉君主的,也只有仁义一条途径。 
每个家庭都有自己的秘密,但在某些国家,这些秘密更大、更危险。
Only a life lived for others is a life worthwhile.