当你尝试新事物时，你永远不知道会发生什么。这一切都是实验性的。

A book is a mirror: if an ass peers into it, you can't expect an apostle to look out.

If you cannot do it, then teach.

To teach how to live without certainty and yet without being paralyzed by hesitation is perhaps the chief thing that philosophy， in our age， can do for those who study it.