In our reasonings concerning matter of fact， there are all imaginable degrees of assurance， from the highest certainty to the lowest species of moral evidence.

To live without experiencing some of the most beautiful relations life affords is not to have lived at all.

错误经不起失败，但是真理却不怕失败。

无论别人告诉你什么，言语和思想都能改变世界。

"In the end, we are all alone, and that is the ultimate truth of existence."