处理一个不自由的世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。

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.

成功不是终点，失败也并非致命，重要的是继续前进的勇气。