——对共产国际派到广州之达林说，1922年4月27日
"We are all in the gutter, but some of us are looking at the stars."
The great advantage of old age is that you can be as rude as you like.
Every exhibition should be an experiment, a risk, a possibility.
我们写的每一个方程都是宇宙的一首诗，是存在伟大史诗中的一节。