关于神，我无法知道他们是否存在，也无法知道他们是什么样子的。许多事情阻碍了知识，包括主题的晦涩和人类生命的短暂。

"The past is a shadow that follows us, but it is also the light that guides us forward."

Freedom is not merely the opportunity to do as one pleases; neither is it merely the opportunity to choose between set alternatives. Freedom is, first of all, the chance to formulate the available choices, to argue over them - and then, the opportunity to choose.

理解数学就是理解现实的构造。