数学中最深刻的洞见往往来自意想不到的类比。

有时最困难的部分不是放手，而是学会重新开始。

I don't believe in pessimism. If something doesn't come up the way you want, forge ahead. If you think it's going to rain, it will.

I'm not here to be liked. I'm here to be myself.

解释：称赞人不夸大他好的地方，那么听的人心里不痛快；诽谤人不增加他的过错，那么听的人心里不满足。