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。
当学到的知识被遗忘后，剩下的就是教育。
The night doesn't always bring answers, but it always brings the right questions.
智者能够从自然界的秩序中汲取启示，以指导个体的生活。
My work is about people more than anything else.
Free vaccines are more valuable than expensive treatments, yet harder to promote.
