在观察性研究中，我们常常不得不依赖于无法直接检验的假设。
The right of nature... is the liberty each man hath, to use his own power, as he will himself, for the preservation of his own nature; that is to say, of his own life.
对所有生物的爱，是人类最高贵的品质。
大多数战略的问题不在于它们是错误的，而在于它们是无关紧要的。
Think you're escaping and run into yourself. Longest way round is the shortest way home.
"Every film is a documentary of its own making."