My mind is my weapon. My brother has his sword, King Robert has his warhammer, and I have my mind... And a mind needs books as a sword needs a whetstone, if it is to keep its edge.
我认为这是最好的生活方式：活在每一刻。
If you're not failing occasionally, you're not pushing the boundaries enough.
The unity of mathematics is not imposed but discovered.
战斗越艰难，胜利就越甜美。