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!
The past is never dead. It's not even past.
在当今世界，数字技能和读写能力一样重要。
There is no easy walk to freedom anywhere, and many of us will have to pass through the valley of the shadow of death again and again before we reach the mountaintop of our desires.
No man should judge unless he asks himself in absolute honesty whether in a similar situation he might not have done the same.
我不想只是制造东西。我想让东西变得更好。
我梦到了我的儿子会成长为一个好人，一个拥有自由意志的人；我梦到了有一天，你会回到我们童年玩耍的这片土地，故地重游；我梦到了鲜花再次在街道上盛开……天空满是色彩斑斓的风筝!