真相很少是纯粹的,也从不简单。
"The truth is rarely pure and never simple."
Every landscape is a state of mind.
A good mathematician is lazy, but in a constructive way.
对民主的最大威胁不是来自外部敌人,而是来自内部腐败和公民美德的丧失。
如果没有地幔对流的概念,大陆漂移理论将只是一种猜测。