The method of introspection must be rigorously controlled.

The most important thing is to keep the most important thing the most important thing.

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.

焦虑是自由的眩晕。

"The future is not something we enter; it's something we create."