Do not say a little in many words but a great deal in a few.
The tears of the world are a constant quantity. For each one who begins to weep, somewhere else another stops. The same is true of the laugh.
Books say: She did this because. Life says: She did this. Books are where things are explained to you; life is where things aren't.
The only limit to our realization of tomorrow will be our doubts of today.
数学之美不仅在于它描述世界的能力,还在于它揭示支配世界的隐藏结构的力量。