有作为的人胸襟坦荡，肯定与众不同；有智慧的人，其才情决然不会公开显露。

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.

历史不是机械的，因为人们有自由去改变它。