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。
I’m not afraid of making mistakes. I’m afraid of not trying.
The laws of physics are the same in every corner of the universe, a testament to the unity and coherence of the cosmos.
没有比真理更高的神。
可持续性需要大胆的愿景和不懈的执行。