"The world is a book, and those who do not travel read only one page."

To write is to give voice to the voiceless.

The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

The only real failure in life is not to be true to the best one knows.

每本书都是一次旅程，每次旅程都是一本书。