The past, like the future, is indefinite and exists only as a spectrum of possibilities.

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。

建筑师必须是诗人、建造者和革命者。

The more you know, the more you realize you don't know.

医生知道的如此之少，收费却如此之高。

Every sentence I utter must be understood not as an affirmation, but as a question.

Operational excellence and efficiency improvements are fundamental to reducing our environmental impact.