创新不仅仅是创造新事物，更是改进已有的事物。
Life is 10% what happens to you and 90% how you react to it.
证明的严谨性将数学与所有其他科学区分开来。
The opposite of courage in our society is not cowardice, it is conformity.
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。
The only limits in life are those you impose on yourself.