"Science is the highest personification of the nation because that nation will remain the first which carries the furthest the works of thought and intelligence."

I’m not here to be perfect, I’m here to be real.

Man, unlike any other thing organic or inorganic in the universe, grows beyond his work, walks up the stairs of his concepts, emerges ahead of his accomplishments.

做数学就是探索一个思想的宇宙，唯一的限制是你的想象力。

Love is not enough. It has to be tended, like a fire.

老年的巨大优势在于你可以随心所欲地粗鲁。