Don't dwell too much on the present, nor worry too much about the future. When you've experienced certain things, the scenery before you is no longer the same as before.
不必太纠结于当下,也不必太忧虑未来,当你经历过一些事情的时候,眼前的风景已经和从前不一样了。
A farmer's wisdom often outlasts the latest technology.
In mathematics, you don't understand things. You just get used to them.