一个人不论年龄多大，都要学习自己不懂的东西。这不是羞耻。
It is not shame for a man to learn that which he knows not，whatever his age.
The mind can assert anything and pretend it has proved it.
Exile is strangely compelling to think about but terrible to experience.
对心智的研究应着眼于其适应功能。
The hardest thing is to live richly in the present without letting it be tainted by the past or future.
I can't understand why people are frightened of new ideas. I'm frightened of the old ones.
