说出口的，就是结束且完成的。
What is uttered is finished and done with.
The past is not for living in; it is a well of conclusions from which we draw in order to act.
我是变革的催化剂……作为一个局外人，你不可能在30多年的时间里取得成功而不在周围留下一定的伤痕。
你减去的越多，揭示的就越多。
You want to be extra rigorous about making the best possible thing you can. Find everything that's wrong with it and fix it. Seek negative feedback, particularly from friends.
在数学的世界里，想象力比知识更重要。