失败使我的内心产生一种安全感，这是我从考试中没有得到过的。失败让我看清自己，这也是我通过其他方式无法体会的。我发现，我比自己认为的，要有更强的意志和决心。我还发现，我拥有比宝石更加珍贵的朋友。

What is the difference between a Turing machine and the modern computer? It's the same as that between Hillary's ascent of Everest and the establishment of a Hilton hotel on its peak.

Computation has made the tree flower.

当下总是在变，但过去是固定的。