怎么会有不用同道的人而只用与自己意见相同的人的道理呢？
To the artist there is never anything ugly in nature.
The only way to learn mathematics is to do mathematics.
每个时代的统治思想总是统治阶级的思想。
I don’t let negativity bring me down. I rise above it.
风俗习惯是人类生活的重要指南。