孔子说:“我十五岁立志于学习,三十岁有所建树,四十岁不困惑,五十理解自然规律,六十明辨是非,七十随心所欲,不违规。”
大国攻打小国,就好像儿童爬在地上当马一样。 
"The past is a foreign country; they do things differently there."