因其强而强之,乃可折也;因其广而广之,乃可缺也。
解释:齐国是强国,利用它的强大进攻宋国,让他逞强,燕国就可以乘机打败齐国;齐国是大国,利用它的大国野心吞并宋国,增加土地,燕国就可以乘机进攻。
I'm not going to let anyone bring me down.
"Adventure is worthwhile in itself."
Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.