最深刻的定理往往源于最簡單的觀察。
"The wise man learns more from his enemies than the fool from his friends."
I don't wait for moods. You accomplish nothing if you do that. Your mind must know it has got to get down to work.
【譯文】 孔子說：“讀書不想事，越學(xué)越糊涂；想事不讀書，越想越頭痛?！?
The world is full of poetry, but few have the eyes to see it.