The reason we can stand on stage is because of you.
出自北齐·颜之推《颜氏家训·勉学篇》。秉，持、拿。犹，还。贤乎，胜于。少年时代就好学，就像是早上初升的太阳之光；老来才知道虚心向学，就像是拿着蜡烛走在暗夜中。尽管如此，还是比闭着眼睛什么也看不到要强多了。意在鼓励人们时刻不忘学习上进，如果错过学习的最佳时机，努力追补，仍然是精神可嘉的表现。
种树的最佳时间是20年前，其次是现在。
Writing is a form of self-redemption.
In mathematics, the art of proposing a question must be held of higher value than solving it.