The only way to learn is to live.
学习的唯一途径就是生活。
唯一真正的监狱是恐惧，唯一真正的自由是从恐惧中解脱。
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.
A man who dares to waste one hour of time has not discovered the value of life.
I'm not arrogant, I just believe I'm the best.