程序测试可以用来显示错误的存在，但绝不能显示它们的不存在！
Program testing can be used to show the presence of bugs, but never to show their absence!
Man is the only creature who refuses to be what he is.
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.
表演不仅仅是扮演一个角色，而是生活在角色的生活中。
The passage of time is both a blessing and a curse.
A mind conscious of its purity is attached to nothing， neither to the body nor to the soul.