自由不仅仅是随心所欲的机会；也不仅仅是在既定选项之间选择的机会。自由首先是制定可用选择的机会，对它们进行辩论——然后，才是选择的机会。
Freedom is not merely the opportunity to do as one pleases; neither is it merely the opportunity to choose between set alternatives. Freedom is, first of all, the chance to formulate the available choices, to argue over them—and then, the opportunity to choose.
The essence of mathematics lies in its freedom.
Innovation isn't just about technology; it's about changing mindsets.
用媚字奉养亲人父母，用平淡之心交朋友，用苟字节俭花费，用朴拙免去劳力，用聋字消除诽谤，用盲字远离美色，用吝字防止言说过多，用病字医治婬欲，用贪字读书，用傲字树立风骨，用痴字救济贫困，用空字解脱忧烦，用弱字抵御侮蔑，以悔字改正错误，以懒字控制奔走竞争，以惰字隔除凡人俗事。
Leadership is about making tough decisions and standing by them, even when they are unpopular.
We read books to find out who we are.
The past must be respected, but not copied.