You will never be happy if you continue to search for what happiness consists of. You will never live if you are looking for the meaning of life.
数学的美在于它能够用一种既精确又普遍的语言来描述宇宙。
Believe you can and you're halfway there.
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.