你知道得越多，你需要展示的就越少。
——〈建国方略之一：孙文学说——行易知难〉，1919年5月20日
The more we learn of the true nature of non-human animals, especially those with complex brains and corresponding complex social behaviour, the more ethical concerns are raised regarding their use in the service of man—whether this be in entertainment, as ‘pets,’ for food, in research laboratories or any of the other uses to which we subject them.
数学家的模式，就像画家或诗人的模式一样，必须是美丽的。