数学证明的美在于它的简洁性和必然性。
The beauty of a mathematical proof lies in its simplicity and inevitability.
黄芩（唾手可得）没有造假，阿魏（稀有昂贵）容易造假。
心灵自有其天地，能把天堂变地狱，把地狱变天堂。
Man is an animal that makes bargains: no other animal does this no dog exchanges bones with another.
人是一种做交易的动物，没有其他动物会这样做，没有狗会和另一只狗交换骨头。