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你无法回到过去改变开头,但可以从现在开始改变结局。
You can't go back and change the beginning, but you can start where you are and change the ending.
In mathematics, there are no shortcuts.
熄灭了吧,熄灭了吧,短促的烛光!人生不过是一个行走的影子,一个在舞台上指手划脚的拙劣的伶人,登场片刻,就在无声无臭中悄然退下;它是一个愚人所讲的故事,充满着喧哗和骚动,却找不到一点意义。
The study of mathematics is a journey into the unknown, where each discovery opens the door to new mysteries.
Learn how to tie a bowline knot. Practice in the dark. With one hand. For the rest of your life you’ll use this knot more times than you would ever believe.