Mathematics is not a spectator sport. You have to do it to understand it.
The worst pain is not the pain itself, but the loneliness of suffering.
他一次浸浴看到浴缸溢出的水与自身的重量相等,从而证明了皇帝的皇冠被渗入杂质。
经济研究应旨在为现实世界的决策提供信息。
The artist must be a servant of the invisible.