“ When I have pointed out one corner of a square to anyone and he does not come back with the other three, I will not point it out to him a second time. 举一隅不以三隅反，则不复也。 Confucius 孔子
“ Hope cannot be said to exist, nor can it be said not to exist. It is just like roads across the earth. For actually the earth had no roads to begin with, but when many men pass one way, a road is made. 希望是本无所谓有，无所谓无的。这正如地上的路；其实地上本没有路，走的人多了，也便成了路。 Lu Xun 鲁迅