International politics is a ruthless and dangerous business, and it is foolish to expect states to behave according to moral principles.
国际政治是一项残酷而危险的业务，期望国家按照道德原则行事是愚蠢的。
我不害怕坠入爱河，我害怕再次爱上错误的人。
Craftsmanship is the soul of furniture-making; without it, we're just assembling materials.
唯一存在的限制是你给自己设定的限制。
要读得好，必须成为一个发明家。既有创造性的阅读，也有创造性的写作。
Optimists tend to interpret their troubles as transient, controllable, and specific to one situation. Pessimists, on the other hand, believe that their troubles last forever, undermine everything they do, and are uncontrollable.