Science is simply common sense at its best—that is, rigidly accurate in observation, and merciless to fallacy in logic.  

To be a writer is to sit down at one's desk in the chill portion of every day, and to write; not waiting for the little jet of the blue flame of genius to start from the breastbone.

哲学是提出正确问题的艺术，并在未知中寻求智慧。

自由就是对自己负责。

坚持做自己，不要因为别人的眼光而改变自己。