Everything is a learning process: any time you fall over, it's just teaching you to stand up the next time.
A proof tells us where to concentrate our doubts.
写作就是直面存在的混乱并赋予其意义。
To see a world in a grain of sand, and a heaven in a wild flower, hold infinity in the palm of your hand, and eternity in an hour.
I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.
The seabbard is content to be dull when it protects the keenness of the word.