计算理论不仅仅是关于解决问题，还涉及理解可计算性的极限。

诗人的灵魂就像一面镜子，映照出世界的美。

The greatest blessing of our democracy is freedom. But in the last analysis, our only freedom is the freedom to discipline ourselves.

Three grand essentials to happiness in this life are something to do, something to love, and something to hope for.

You can't start the next chapter of your life if you keep re-reading the last one.

You have to be willing to take risks. If you’re not, you’re not going to make money.