Don't be afraid to make mistakes. If you're not making mistakes, you're not trying hard enough.
To be a good mathematician, you need to have both intuition and rigor.
The city is a living organism, constantly evolving and adapting to the needs of its inhabitants.
译文:年纪大了经不起生死离别,在异乡的日子里眼泪总打湿衣裳。