死者离我们从不遥远。他们在我们心中，在我们脑海里，最终将我们与他们分隔开的不过是一口气息，最后一缕空气。
The dead are never far from us. They’re in our hearts and on our minds and in the end all that separates us from them is a single breath, one last puff of air.
由于缺乏事实而产生的错误，远比基于真实数据但推理不当所产生的错误更多且更持久。
The trick is to pay attention to what's happening around you and to keep writing.
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
The brave may not live forever, but the cautious do not live at all.