下一代不会问我们说了什么,而是问我们做了什么。
计算复杂性理论的发展向我们展示了并非所有问题都是平等的。
You can't let your failures define you. You have to let your failures teach you.
Buying tools: Start by buying the absolute cheapest tools you can find. Upgrade the ones you use a lot. If you wind up using some tool for a job, buy the very best you can afford.