The only real mistake is the one from which we learn nothing.
数学是一种超越文化和语言障碍的通用语言。
No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.
"Every story is a story about death, but perhaps every story is also about life."
Love takes up where knowledge leaves off.