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.

The true value of a mathematician lies in the problems they leave behind.

I never look back. I look forward.

爱不是一种责任，而是一种快乐。

计算机速度极快、精确且愚蠢，人类则慢得难以置信、不精确但聪明。二者的结合是一种无法估量的力量。

一个好老师必须能够设身处地为那些觉得学习困难的人着想。

I know how much work it takes to get to the top, but even more to stay there.

记忆力不是天生的，而是可以训练的。

爵士乐教会我自由，但生活教会我灵魂。