Mathematics is the art of giving the same name to different things.
数学是给不同事物起相同名字的艺术。
Every book is a journey, and every journey is a book.
——对共产国际派到广州之达林说,1922年4月27日
想象力创造现实。
"The world is full of light and life, and the true crime is not to be interested in it."