Memory is a strange thing, it doesn't work like I thought it did. Memory is not a simple thing at all.
记忆是个奇怪的东西，它不像我想的那样运作。记忆根本不是一件简单的事。
做人的气度要高旷但不可疏漏狂妄；心思要缜密但不可琐碎；趣味要淡但不可枯燥；操守要严明但不可激烈。
Every problem in mathematics is an opportunity to learn something new.
变化的速度永远不会比今天更慢。